If the computer does not turn on or the OS does not load, there are several reasons for this.
Conventionally divided into:
- software (operating system initialization error);
- hardware (failure of a specific device).
It’s easy to deal with software problems on your own, without resorting to the help of specialists, while difficulties arise with technical ones. The main task to be solved in such a situation is to identify the cause of the problem.
The power button may be stuck, broken, or the wires coming from it have moved away from the contacts on motherboard.
To check, disconnect the wire labeled “Power SW” from the motherboard and close the contacts in this place with tweezers (simulating pressing a button).
We check the power supply - unplug the PC from the outlet, disconnect the wide 20/24 pin connector from the motherboard, connect it back to the power supply and close the 4th and 5th pins with a paper clip.
If the power supply is working properly, it is in it (if you have a multimeter, measure the voltage at the outputs by comparing it with the screenshots).
The computer turns on, but there is no image
If when you press the power button you hear the characteristic sound of coolers operating, but there is no image on the screen, the problem is as follows:
- faulty video card;
- CPU;
- monitor.
First, make sure the display is in good condition.
To do this, we check whether power is supplied to it. If yes, go to the monitor menu (“Menu” button). When clicked, does a selection dialog appear? This means the problem is in the system unit.
The next step is to check that the video card is working properly (see). If an additional video chip is integrated into the motherboard, temporarily connect a monitor to it. Still no image? This means the chipset is faulty. Otherwise, it's the graphics adapter.
Make resetting the CMOS a mandatory step; a common reason after updating the hardware in the BIOS is that information about the previous device remains in the BIOS, which no longer exists, or a failure occurred and initialization does not occur. Disconnect the PC (unplug the power cord from the outlet), press the ON button on the case (required to remove residual voltage in the capacitors).
We remove the battery from the motherboard, if there is a jumper (jumper) with the inscription “CLEAR CMOS” we move it to the reset position (do not forget to return it to the initial state, otherwise the PC will not start or will begin to reboot cyclically.)
If the computer does not turn on and a black screen is displayed, you can identify the cause of the failure by initializing Post-codes. The motherboard analyzes technical components before booting the system. If at least one of them is faulty, a corresponding sound signal is given. Successful completion of the test is indicated by one short “squeak” from the internal speaker.
If the computer does not turn on, but the coolers are working, the system unit may not have enough power supplied by the power supply (a possible reason for this is dried out or swollen capacitors).
If possible, temporarily install a low-performance video card, disable additional devices (hard drives, DVD drives, expansion cards, coolers, except those installed on the processor). Has the launch started? This means you need to install a more efficient power supply.
The computer beeps and won't turn on
We determine the name of the BIOS developer company (see) of the motherboard (from the technical documentation).
In AMI, 5 short signals means a problem with socket initialization; the fault lies in the operation of the processor.
Whereas in Phoenix it is a failure of the hard drive (or the SMD component that supplies power to it).
8 short (or 1 long and 3 short) in AMI - a problem with turning on the video card. In Award, a similar error is indicated by 1 long and 2 short signals, in Phoenix - 3, 4, 1 short “squeaks” with a break of 2 seconds.
Two short signals on motherboards (except older Asus ones) inform about a problem with RAM (an image appears, at least - the manufacturer’s logo).
The absence of signals indicates power problems or the processor (perhaps they changed the thermal paste and bent the tab on the contact pad).
If the computer beeps and does not turn on, service centers Troubleshooting is performed using a POST test card (connected to the PCI bus).
What each code means is indicated in the technical instructions. The cost of the device starts from 300-500 rubles.
Computer suddenly shuts down when booting
What should you do if your computer turns on and off within just a few seconds? The problem lies in a faulty power supply (there may simply not be enough power after a system upgrade, as described above, the jumper was not returned to its place after resetting CMOS) or missing cooling (if the processor, video card or any of the bridges overheat, the system automatically turns off the power to protect the components from damage).
We check whether the cooler and radiator are installed correctly. Next, we clean it from dust and replace (if necessary) the thermal paste. If this does not help, install a known working power supply. Have there been any changes? The motherboard is faulty and only a service center will help.
If the computer reboots itself during operation, this indicates problems with cooling the processor (see) or video card. Sometimes - in damaged sensors that are responsible for taking temperature readings.
Every time the computer boots, system unit makes a squeak. Not everyone knows that this is a signal indicating the performance of the system unit. And only a few know how to decipher these signals from the system unit.
That's what we'll talk about. If you are reading this material, I recommend printing it out now. When you need decryption, you won’t be able to get online. :)
So what is the “system specialist” squeaking about? These signals are the results of testing hardware computer (cooler, RAM, video card, etc.). Every time you boot your computer, it tests the hardware and reports the results with this particular squeak. The transcript of the system unit squeaks is below.
* One short squeak.
Explanation:
Everything is fine. The test was completed successfully. You can continue to work. It happens that some system units do not beep at all at this moment.
* There is not a squeak or image on the computer screen.
Explanation:
Malfunction in the power supply or processor.
Correction:
First, check to see if the power cord is plugged into the outlet. If everything is in order, try connecting a known working device to the surge protector (such a cord with a box in which there are many sockets, there is also a switch button, usually red). A phone charger will do, of course, with a phone connected to it. You need to check all the surge protector sockets. If the socket is working, the phone will charge. Next, we check whether the power supply starts when you press the computer start button. In this case, the cooler (fan) of the power supply should at least twitch. If there is movement, look new processor, otherwise - new block nutrition. You also need to check the power cable of the motherboard. It may happen that he moved away.
* One long continuous squeak.
Explanation:
The power supply is faulty.
Correction:
Purchasing a new power supply.
* Two short squeaks.
Explanation:
Minor problems with BIOS settings.
Correction:
Go to the BIOS and set the optimal parameters. Exiting to the BIOS is usually done using the key. If you don't know what to change, then set the default values. To do this, press the button. To exit with saving - , . Some BIOS version They themselves highlight conflicting settings items. You can also reset the BIOS settings by removing the motherboard battery for a few seconds.
* Three long squeaks.
Explanation:
The keyboard is missing.
Correction:
Plug the keyboard into the PS/2 socket. If this does not help, you will have to change the keyboard.
* Three short squeaks.
Explanation:
Error random access memory.
Correction:
To do this, you need to check whether there are memory sticks on the motherboard. Don't laugh, it happens. Then you need to remove all the memory sticks, carefully sweep away the accumulated dust, and one by one stick the memory stick in and start the system unit. If the “system unit” beeps on some strip, this may mean that the strip is faulty.
* One long and one short squeak.
Explanation:
RAM is not working properly.
Correction:
Perhaps one or more memory sticks are conflicting with each other. You need to insert one memory stick at a time and try to start the computer.
* One long and two short squeaks.
Explanation:
The video adapter is not working properly.
Correction:
Correct settings in BIOS.
* One long and three short squeaks.
Explanation:
The video adapter does not work.
Correction:
Check the performance of the video card. To do this, you need another, known working video card. You can also try removing the card, removing dust from the slot, and sticking the card back in place. And don’t forget to check if the card has additional plugs for power. Power to such video cards must be supplied with a separate cord to which no device is connected. I also suggest checking whether the monitor is connected and working. Try to blow out the connector connecting the monitor to the computer.
* One long and eight short squeaks.
Explanation:
The video adapter is not working or the monitor is not connected.
Correction:
Same as written above.
* One long and nine short squeaks.
Explanation:
Error reading BIOS data.
Correction:
Try resetting the BIOS settings by removing the battery. If this does not help, then flash the BIOS. But this is another story, requiring a separate article. I'll try to write it soon.
* Four short squeaks.
Explanation:
The system timer does not work.
Correction:
You can try resetting the BIOS. But, unfortunately, it rarely helps. There is only one way out - replace or repair the motherboard.
* Five short squeaks.
Explanation:
The processor is not working properly.
Correction:
Try to clean the dust from the processor slot, make sure the heatsink is clean and the processor temperature is low.
* Six short squeaks.
Explanation:
The keyboard is faulty.
* Seven short squeaks.
Explanation:
Motherboard malfunctions.
Correction:
Have the motherboard repaired or purchase a new one.
* Eight short squeaks.
Explanation:
Problems with video memory.
Correction:
Take the video adapter for repair, or purchase a new one.
* Nine short squeaks.
Explanation:
Incorrect BIOS checksum.
Correction:
Usually it is suggested to reset the BIOS settings and allows you to continue working. If something happens, you can reset the BIOS by removing the battery.
* Ten short squeaks.
Explanation:
Error writing data to CMOS chip.
Correction:
This error may occur when flashing the BIOS. Therefore, we will describe this part in another article.
* Eleven short squeaks.
Explanation:
The cache memory is not working properly.
Correction:
Reset BIOS. If this does not help, we take the computer in for repair or install a new processor.
* Repeated long squeaks.
Explanation:
The RAM is faulty or incorrectly connected.
Correction:
Reconnecting memory sticks. Calculating the faulty one by connecting one by one and starting the computer. Cleaning from dust.
* Repeated short squeaks.
Explanation:
The power supply is not working properly.
Correction:
Checking the functionality of the power supply, checking the cords for breaks, checking the surge protector, and, last but not least, replacing the power supply.
That's all. If you have any questions, ask.
PS: To reset the BIOS, instead of removing the battery, you can use a special jumper. Its location can be found in the documentation for the motherboard.
Addition: encodings BIOS signals’a if the computer died.
AWARD BIOS Signals
Continuous signal. The power supply is faulty.
2 short. Minor errors found.
3 long. Keyboard controller error.
1 long + 1 short. Problems with RAM.
1 long + 2 short. Problem with the video card.
1 long + 3 short. An error occurred while initializing the keyboard.
1 long + 9 short. An error occurred while reading data from the read-only memory chip.
1 long repeating. Memory modules are installed incorrectly.
1 short repeating. Problems with the power supply.
AMI BIOS signals
There are no signals. The power supply is faulty or not connected to the motherboard.
1 short. No errors found.
2 short. RAM parity error.
3 short. An error occurred during the operation of the first 64 KB of main memory.
4 short. The system timer is faulty.
5 short. The central processor is faulty.
6 short. The keyboard controller is faulty.
7 short. The motherboard is faulty.
8 short. Video memory is faulty.
9 short. BIOS chip contents checksum error.
10 short. Cannot write to CMOS memory.
11 short. The external cache memory (installed in the slots on the motherboard) is faulty.
1 long + 2 short. The video card is faulty.
1 long + 3 short. The video card is faulty.
1 long + 8 short. Problems with the video card or the monitor is not connected.
PHOENIX BIOS signals
1-1-3. CMOS data write/read error.
1-1-4. BIOS chip contents checksum error.
1-2-1. The motherboard is faulty.
1-2-2. DMA controller initialization error.
1-2-3. Error when trying to read/write to one of the DMA channels.
1-3-1. RAM regeneration error.
1-3-3. Error when testing the first 64 KB of RAM.
1-3-4. Error when testing the first 64 KB of RAM.
1-4-1. The motherboard is faulty.
1-4-2. RAM testing error.
1-4-3. System timer error.
1-4-4. Error accessing I/O port.
3-1-1. Error initializing the second DMA channel.
3-1-2. Error initializing the first DMA channel.
3-1-4. The motherboard is faulty.
3-2-4. Keyboard controller error.
3-3-4. Video memory testing error.
4-2-1. System timer error.
4-2-3. Line error A20. The keyboard controller is faulty.
4-2-4. Error when working in protected mode. The CPU may be faulty.
4-3-1. Error when testing RAM.
4-3-4. Real time clock error.
4-4-1. Serial port test failed. The error may be caused by a device using this port.
4-4-2. Error while testing parallel port. The error may be caused by a device using this port.
4-4-3. Error when testing the math coprocessor.
It is not uncommon for users of desktop computers to encounter a problem when the system unit beeps when turning on the computer. Although the fans are spinning and some may think that the computer is turned on.
In this article we will tell you how you can try to fix it yourself. this problem and by the number and type of signals emanating from the system unit, determine where to begin the repair.
Why does the system unit beep?
As soon as you press the power button on the system unit, the motherboard begins testing all components installed on it. If everything is fine and the test is passed, one short signal is issued. In all other cases, when a particular problem is detected, a certain sequence of signals is issued, which will help us determine what exactly the problem is.
If the system unit beeps, then it's actually not that bad. It’s much worse when when you turn it on it just . Firstly, this means that the same small speaker is connected to the motherboard, which produces a certain sequence of peaks.
By the nature and sequence of the peaks, you can easily determine what the problem is. For example, in Award BIOS means problems with RAM, and means problems with the video card.
A complete breakdown of all possible combinations is presented in.
What to do?
The first thing to always start with is RAM. Simply remove the memory modules, wipe the contacts on them and insert them into place. You can also try swapping them or inserting them one at a time if there are several of them.
One possible reason is poor RAM contact
If you have a video card, be sure to remove it from the motherboard connector, clean the contacts, and reinstall it.
Installing/removing a video card
If none of the above helped, you can also try installing another power supply that is known to work, borrowing it from friends or acquaintances.
You can also try resetting the BIOS settings for a few minutes.
How to change the battery in a computer
If none of the above helped, then most likely you have problems with motherboard, which in most cases needs to be replaced with a new one.
Any technique, even the most advanced, can malfunction. Modern computers equipped with devices capable of informing about problems through special sound signals, as well as indicate the location of the breakdown. It is important to correctly evaluate the sound code, as it differs depending on the BIOS version and device manufacturer.
The sound that can be heard during various problems with a personal computer or laptop comes from a small speaker located in the power supply housing. The presence of uncharacteristic audio signals always indicates failures at the technical or software levels.
Normally, we hear only one short sound, which indicates complete technical serviceability and successful startup of the system. The most common reasons include:
- Dusty parts. As a result, the normal functioning of certain areas is disrupted due to changes in signal transmission or ineffectiveness of the cooling system. Causes up to 80-90% of all malfunctions, 70% of which occur in RAM modules. After removing excess dust particles, the computer returns to normal life.
- Need to replace thermal paste. Normally, the radiator should remove heat from the processor, but both elements do not have perfectly smooth surfaces. The problem is solved by adding a special mixture to this space. Over time, the structure of the paste begins to harden and thermal conductivity decreases. The processor may instantly overheat when the system starts and shut down. The recommended frequency of changing the heat-conducting mixture is once every 6 months.
- Faulty parts. The most common problems are the video card, RAM and motherboard. Ascertaining the failure of the latter is possible only with full confidence in the serviceability of other parts of the computer. In this option, it is important to “collect anamnesis”: whether the modules were replaced in Lately, whether there were episodes of unreasonably freezing or shutting down, etc.
- Problems with the power supply. This is a typical situation for old computers (5-7 years or more), when it is not possible to provide adequate power to the video card or processor.
There are several simple ways to diagnose damage:
Procedure to identify the cause
Diagnosis does not present significant difficulties. The following steps must be taken:
- Find out the BIOS version.
- Compare the frequency and duration of the signals with the corresponding tables.
- Determine the type of technical or software failure.
- Try to solve the problem yourself. If unsuccessful, you should contact a specialist.
Types of BIOS
BIOS is a set of programs that are necessary for the operation and interaction of PC hardware and all connected peripheral devices.
To find out the version, you can:
How to enter BIOS
Typically you need to press one or two keys at the same time. The basic combinations from hardware software manufacturers are as follows.
List table possible options BIOS login for different versions.
The order in which the BIOS starts may vary between different manufacturers. personal computers and laptops. For clarity, the data is presented in table form.
A table with a list of possible options for entering the BIOS on devices from different manufacturers.
| Company | Keys | Image |
|---|---|---|
| Acer | "F1" or "F2" |  |
| AST | "Ctr+Alt+Esc" or "Ctr+Alt+Del" ("Delete") |  |
| "F1" or "F3" |  |
|
| "F2" |  |
|
| "Fn+F1" or "F2" |  |
|
| HP | "F1", "F2" |  |
| "Ecs", "F1" |  |
|
| Sony | "F2", "F3" |  |
| Tiget | "Delete" |  |
| "F1" or "F2" or "Delete" |  |
|
| "F10" |  |
How to recognizeBIOS by appearance
If you can launch the firmware collection, you can distinguish different kinds by design and character of text display. Below are illustrations of the most common versions:
Decoding computer signals
Once determined software, you need to start decoding the messages. To do this, you should listen carefully - the signals can have different durations and quickly replace each other. These features will indicate the location of the breakdown.
Award BIOS
| Length and order of signal changes | Interpretation of the failure and possible reasons elimination |
|---|---|
| 1 short | Testing of all systems has been successfully completed, the operating system has started to launch |
| Brief – 2 pcs. | You should check the connection density of all devices (loops) and reset the BIOS settings |
| Long lasting – 3 pcs. | |
| 1 short and 1 long | RAM error. It is necessary to check the tightness of the contacts and clean them from dust particles. Most likely the element needs to be replaced |
| Failure to receive information from the video card or its absence. You should disconnect the contacts, wipe them from dust or replace the video card | |
| Video memory acquisition failed. You should disconnect the contacts, wipe them from dust or replace the video card | |
| 1 long and 9 short | Reading the persistent replacement device failed. Need to replace ROM or motherboard module |
| Brief, repetitive | Incorrect operation of the power supply. Requires dust cleaning and contact treatment. You can try replacing the power supply unit or RAM |
| Long-lasting, constantly recurring | RAM playback failed. Needs dust cleaning |
| Continuous repeating signal with constant frequency changes (low-high) | Defect in the processor or its absence |
| Continuous monotonous | Power supply failure. Solution: cleaning from dust or replacing the element |
Phoenix BIOS
Reference! In the table, sound codes are displayed in the format “one, two, three”, where the numerals indicate the number of consecutive sounds, and the comma indicates a pause.
| Sound code | Interpretation of the results and solution to the problem |
|---|---|
| One, one, two | The processor is faulty or incompatible with the motherboard. Module replacement required |
| One, one, three | CMOS data playback or recording error occurred. Need to replace BIOS battery or motherboard |
| One, one, four | BIOS startup checksum calculation failed. Need to replace the battery or motherboard module |
| One, two, one | Main board startup error. You need to restart the PC, disconnect any expansion cards, and reset the BIOS to factory settings. Using switches located on the main unit, you need to update the CMOS or, if possible, perform these actions through the BIOS |
| One, two, two or one, two, three | DMA controller failure. Requires rebooting the device and turning off the add-on cards. Most likely you need a new motherboard |
| One, three, one | RAM playback error. Requires installation of a new RAM drive or motherboard unit |
| One, three, three or one, three, four | Problem with recording and playback of the initial 64 KB of device RAM. You need to check the correct installation of the operating unit modules, clean the contacts or replace the RAM completely |
| One, four, one | Main board startup failed. You should reboot the PC, reset the BIOS and clear the CMOS using the motherboard toggle switch. All other modules must be disconnected from the motherboard |
| One, four, two | |
| One, four, three | |
| One, four, four | There was an error in recording or playback of any input or output port. It is necessary to disconnect from the power supply and disconnect all peripheral devices from the system unit (monitor, printer, mouse, etc.) |
| Three, one, one | DMA channel #2 failed to start. You should turn off the PC and any existing expansion cards. You may need a new motherboard |
| Three, one, two or three, one, four | DMA channel #1 failed to start. You should turn off the PC and any existing expansion cards. You may need a new motherboard |
| Three, two, four | Error in the device that controls the keyboard. The input device needs to be reconnected or replaced |
| Three, three, four | Video card playback failure. You need to reconnect the video adapter cable or connect a new one instead of the obviously faulty one. With an integrated adapter, the RAM module is checked: it needs to be removed and the contacts wiped, or a new one connected |
| Four, two, one | Error starting system timer. It is recommended to disconnect the PC from power and reset the CMOS using the toggle switch on the motherboard |
| Four, two, two | Testing of all systems and peripheral devices has been successfully completed. Everything is fine |
| Four, two, three | The problem is with the device that controls the keyboard. You need to reconnect this technical device or connect a new one. The motherboard may have failed |
| Four, two, four | Fatal failure when transforming the processor into protected mode. You need to restart CMOS using the lever on the motherboard or replace the processor with a new one |
| Four, three, one | Problem starting RAM. You need to check that the blocks are installed correctly in the connectors |
| Four, four, two | The parallel port failed to start. It is recommended to turn off the power to the PC and use the motherboard levers to return the CMOS to the zero position. If these steps do not help, then you need to take an additional board with the required port |
| Four, four, three | The math processor failed to start. Turn off your PC. If the error persists - critical damage to the main processor |
Video - Computer breakdown. BIOS signals
AMI BIOS
| Type of audio information | Decoding and ways out of the situation |
|---|---|
| 1 short | System test completed successfully |
| Brief – 2 pcs. | Error in monitoring the correct operation of RAM. Turn off the PC, check that the RAM modules are installed correctly by disconnecting and connecting the ports. Disable the "ECC" option in the BIOS menu |
| Brief – 3 pcs. | Failure to play the initial 64 KB of device RAM. You need to check that the RAM modules are installed correctly, clean the contacts or replace the RAM module completely |
| Brief – 4 pcs. | Error starting system timer. You should disconnect the computer from the network and reset the CMOS on the motherboard using a special toggle switch. The motherboard unit may need to be replaced |
| Brief – 5 pcs. | The main processor failed to start. You need to disconnect the computer from the power supply, reset the CMOS using the levers on the motherboard, or replace the processor with a new one |
| Brief – 6 pcs. | The problem is with the device that controls the keyboard. It is necessary to reconnect this technical device or connect a new one. The motherboard may have failed |
| Brief – 7 pcs. | Base unit startup failed. You should reboot the electronic computing device, return the BIOS to factory settings and clear the CMOS using the motherboard levers. All unnecessary modules must be disconnected from the motherboard |
| Brief – 8 pcs. | The video card failed to start. You need to check the connection of the video card by reconnecting it to the slot. If the module is integrated, you need to check the RAM block |
| Brief – 9 pcs. | The BIOS battery needs to be replaced because there is a problem with the checksum calculation |
| Short – 10 pcs. | The BIOS battery needs to be replaced because there is an error in writing or playing back CMOS data. |
| Brief – 11 pcs. | Data cache startup failed. The cache memory is available in slots designed to complement the motherboard unit. You need to disconnect the PC from the network and insert the elements into place. If necessary, faulty modules are replaced |
| 1 long and 1 short | Power supply failure. Needs dust cleaning or replacement |
| 1 long and 2 short | Failed to receive data from the video card. Requires cleaning of dust and reconnection of cables. If necessary, replace the module |
| 1 long and 3 short | Video adapter failure. Requires cleaning of dust and reconnection of cables. If necessary, replace the module |
| 1 long and 4 short | No video card. You need to pull it out and reinsert it, after making sure that this block is present |
| 1 long and 8 short | Lack of monitor connection or video card malfunction. It is necessary to check the serviceability of the connection of the above devices |
| Long lasting – 3 pcs. | Testing reading or writing RAM ended with errors. RAM is not installed or connected incorrectly. You need to check that the module is connected correctly |
| Monotonous continuous sound | Functional error of the power supply or PC overheating. Needs dust removal or thermal paste replacement |
Compaq BIOS
| Sound code | Interpretation of results and options for solving the problem |
|---|---|
| Brief – 1 pc. | The system started successfully. Testing found no errors |
| Brief – 2 pcs. | Any system error. Full check required |
| 1 long and 2 short | Video card reading failure. Requires cleaning of dust and reconnection of cables. If necessary, replace the module |
| Brief – 7 pcs. | Video card reading failure (AGP). Requires cleaning of dust and reconnection of cables. If necessary, replace the module |
| 1 monotonous sound | RAM playback or writing error. There is no RAM or it is connected incorrectly. You should check that the module is connected correctly |
| 1 short and 2 long | Failure to receive data from RAM. You need to make sure that the blocks are installed in the appropriate ports, or replace the entire module |
Video - The computer beeps when turned on. What is this?
Troubleshooting in other ways
If you have problems starting your computer, deciphering beeps, or reading the LEDs on the panel, you can resort to simple ways elimination:
Features of PC dust removal
There are 2 main options for removing dust from the system unit case:
- fast (without filming and detailed processing of modules);
- painstaking (every element is cleaned and thermal paste is replaced).
To work you will need a Phillips and straight screwdriver, ethanol, a brush or cleaning brush and a vacuum cleaner.
On a note! To process large parts, you can use a paint brush; for small parts, you can use a stationery brush.
At each stage, it is recommended to take photographs so that later you can easily install all devices in the same positions. The location of the blocks differs among different manufacturers and models of devices, and therefore significant difficulties may arise.
Disassembling the system unit
The PC is disconnected from the power supply and all peripheral devices are disconnected. In 99% of cases the lid is located on the side. The procedure is as follows:
Important! When implementing quick cleaning It is enough to remove all visible dust. If it is deep, remove individual elements, the main one of which is the cooling system (radiator and coolers).
How to remove the cooler
How to remove a radiator
There are 2 options for mounting the radiator - screw or lock.
If the paste in the gap between the processor and the cooling element has dried out, then due to hardening the processor may also come off. In this case, you need to pry off the line of contact with a ruler or strip and separate the parts.
Removing the processor
The processor is secured with a plastic retainer. The latches on the socket are released and main element The computer can be removed without much effort. On back side The legs are located on the block; under no circumstances should they be damaged.
Cleaning scheme
Step 1. Use a dry brush and vacuum cleaner to remove all visible dust. When connecting the hose to the corner parts of the housing, you need to carefully remove dust particles with a brush. When working, you need to be careful with all protruding elements so as not to damage them.
Important! Under no circumstances should you use a damp sponge or cloth. Such changes disable working elements. When you turn on a computer that is not dry enough, a short circuit or slowdown in signal transmission may occur due to oxidation of the contacts.
Step 2. Then remove the remaining thermal paste from the processor using a paper napkin soaked in an alcohol solution. If the paste is significantly hardened, acetone can be used. In the same way, traces of thermal paste are removed from the radiator.
Step 3. The fan is blown through with air and wiped with a cloth soaked in an alcohol solution. You should be careful when working with the blades of the device, as they have the least strength.
Replacing thermal paste
Step 1. Parts of the processor that were covered with thermal paste are re-coated with it. The mass is applied evenly, the layer thickness should not exceed 0.5 mm.
Step 2. The paste is spread evenly with a swab or a payment card. It is very important to lubricate the entire outer area of the processor that touches the heatsink. Excess from the edges is removed with cotton balls or paper napkins.
Reassembly
Step 1. The processor is installed in such a way that the gold fixing corner coincides with the same one in the connector. Then the radiator is placed under special hooks or clamps and pressed with a handle. It should fit well and not be loose.
Step 2. The coolers are screwed into their original positions. A check is in progress. Blades at correct installation do not make otherworldly sounds. The last step is attaching the cover of the system unit case.
Conclusion
Thus, you can easily find out the cause of the breakdown by deciphering the sound signals emitted by the computer. However, the help of a specialist may not be required, since there are options for fixing problems on your own, the main thing is to handle all elements carefully so as not to damage them.
Video - The computer beeps and does not turn on
The essence of the problem: You turn on the computer, and a squeak comes from the system unit
Solution to the problem:
1. You need to find out the BIOS manufacturer of your motherboard. The easiest option is to find the name of the BIOS manufacturer in the instructions for the motherboard. If you have not saved the instructions, open the system unit, look at the motherboard model, go online through the computer of friends, relatives, neighbors and look for the BIOS manufacturer
2. If you nevertheless decide to open the system unit yourself, then all actions inside must be performed with the power turned off, having first removed the electrostatic charge (before touching the parts inside the computer, touch the metal chassis of the case). Even after removing the electrostatic charge, try not to touch the terminals of the microcircuits.
3. If you doubt your knowledge and ability to fix the problem yourself, contact a specialist
Below are decodings of BIOS signals from two of the most popular manufacturers - Award BIOS and AMI BIOS:
If there are no signals at all, you need to check the power supply, it may be faulty or not connected to the motherboard. You can try to clean it from dust, check the reliability of the power connector on the motherboard. If the above tips do not help, the power supply must be replaced or sent for repair.
Award BIOS:
- solid continuous signal – the power supply is faulty;
- 1 short signal – no errors detected, PC is working;
- 1 short periodically repeating signal – problems with the power supply;
- 1 long periodically repeating signal – RAM malfunction (we try to remove the RAM module from the slot and insert it again, if that doesn’t help, the module needs to be replaced);
- 2 short beeps – minor errors were detected (check the reliability of the cables and cables in the motherboard connectors, set the BIOS to default values (Load BIOS Defaults item);
- 3 long - the keyboard controller is faulty (check the integrity of the keyboard cable and the quality of the connections, check the keyboard on a known-good computer, if that doesn’t help, the motherboard needs to be repaired or replaced);
- 1 long, 1 short – RAM malfunction;
- 1 long, 3 short – keyboard malfunction;
- 1 long, 9 short – error when reading data from the BIOS chip (reflashing the chip is required, if that doesn’t help, the chip needs to be replaced.
AMI BIOS:
- 1 short signal – no errors were detected, the computer is working;
- 2 short beeps – RAM malfunction (we try to remove the RAM module from the slot and insert it again, if that doesn’t help, the module needs to be replaced);
- 3 short – error in the first 64 KB of main memory;
- 4 short – system timer malfunction (restart the computer, if this does not help, the motherboard needs to be repaired or replaced);
- 5 short beeps – CPU malfunction (restart the computer, if that doesn’t help, the CPU needs to be repaired or replaced);
- 6 short - malfunction of the keyboard controller (check the integrity of the keyboard cable and the quality of the connections, check the keyboard on a known-good computer, if this does not help, repair or replacement of the motherboard is necessary);
- 7 short – motherboard malfunction (restart the computer, if that doesn’t help, the motherboard needs to be repaired or replaced);
- 8 short – video card RAM malfunction (restart the computer, if that doesn’t help, the video card needs to be repaired or replaced);
- 9 short - an error when checking the checksum of the BIOS chip (reflashing the chip is required, if this does not help, the chip must be replaced.
- 10 short – it is impossible to write to CMOS memory. We try to reset the memory contents. To do this, turn off the computer and remove the network cable from the outlet. We look for the switch next to the CMOS memory battery and set it to the Clear CMOS position. Press (!!!with the network cable disconnected!!!) – the computer power button. Set the switch to its original position. If your motherboard does not have a switch, you will need to remove the battery for 30 minutes or more. Setting the values BIOS settings by default (Load BIOS Defaults). If this does not help, the BIOS chip must be replaced;
- 11 short – RAM malfunction;
- 1 long, 2 short beeps – video card malfunction (we try to remove the video card and reinsert it, check the integrity and quality of the monitor cable connection, if this does not help, the video card must be replaced);
- 1 long, 3 short – video card malfunction;
- 1 long, 8 short – video card malfunction.
