How to check the motherboard?

If your computer has stopped functioningit is necessary to search for the reason of its breakdown. If you suspect that this cause was the failure of the motherboard, then it must be tested. But before you check the motherboard you should know what are the main causes of its breakdowns, because after that they will be easily eliminated.

Checking the motherboard

To check the motherboard foroperability, it is necessary to have a working processor and working power supply. After you disassemble the processor and get to the motherboard, first it should be inspected for visible defects. It is necessary to check all capacitors, are they not swollen? As the main reason for the inoperability of the motherboard are exactly these. If blown condensers are found during the inspection, then such a board should be replaced, because it will not work stable. If the capacitors are OK, then reset the CMOS settings. The sweater on the motherboard next to the battery is labeled CLR_CMOS or CCMOS. There are three contacts on it, the first and the second being closed in the standard mode. To reset the settings you need to close the second and third contacts for a few seconds, and then return the jumper to its previous position.

Next, disconnect the power supply from the mains andDisconnect all loops from the motherboard, leaving only power. In addition, you need to disconnect all devices from it. Then you can remove all the cards from the slots and RAM. In it, only the processor should be installed. After that, you need to plug in the power supply and start the computer. If the speaker issues a signal, the RAM is faulty. If there is no sound, the motherboard is non-working and it should be replaced.

Sometimes the computer does not work for a reasonmalfunction of the video card. In this case, the performance of the motherboard can be checked by disconnecting the power supply from the network and installing the memory module in the first slot. Then you need to re-enable the unit and start the computer. If the speaker issues a signal about the video card error, and the BIOS splash appears on the monitor, the motherboard is functional.

If the above methods did not yield results andthe question of how to verify the performance of the motherboard remains relevant, then maybe it does not work because of some poor-quality device. To test this theory, when the computer's power is off, disconnect the LPT connector, mouse and other devices and turn on the computer. If it works properly, the motherboard is not relevant, you need to change one of the devices. And if the PC still does not work, then it's a malfunction of the board.

Often the motherboard does not work ifThe Reset button does not work correctly. It happens that it "short". To do this, you need to disconnect the F_PANEL-RS wire from the board and check whether the body of the system unit itself is "short". You can put it on dielectric for this. It would also be nice to check the voltage on the battery BIOS. So if it is less than 2.9V, then it needs to be changed. Now you know how to test the performance of the motherboard and can fix all the problems yourself.