Computer Motherboard Repair Method

Computer Motherboard Repair Method

One, CMOS parameter loss

After the boot prompts "CMOS Battery State Low", sometimes can be started, using a period of time after the crash, this phenomenon is mostly caused by CMOS power supply. For different CMOS power supply methods, take different measures:

1. Welding Battery: Soldering a new battery with soldering iron.

2. Button-Type battery: direct replacement.

3. Chip Type: Replace this chip preferably with the same model chip replacement. If the replacement of the battery after a long time and the same phenomenon, it is likely that the motherboard leakage, can check the motherboard on the diode or capacitor is damaged, you can also use external battery jumper.

Second, the motherboard on the keyboard interface can not be used

Connect a good keyboard, post when the prompt "keyboard Interface Error" after the crash, unplug the keyboard, reinsert and then normal boot system, use a period of time after the keyboard no response, this phenomenon is mainly a number of times to unplug the keyboard to cause the motherboard keyboard interface loose, Remove the motherboard with a soldering iron can be, or a live unplugged keyboard, causing the motherboard on a security block (marked on the motherboard for FN), replaced by a 1 ohms/0.5 watts of resistance can be.

Third, integrated on the motherboard of the display adapter failure

Generally speaking, the computer power-on a few sound, most of the motherboard memory is not plugged in or display adapter failure. There is a great Wall microcomputer, power-on 8 sound, determine the monitor adapter failure. Open the chassis discovery the display adapter is integrated on the motherboard without a motherboard specification. In this case, look carefully at the jumper markings on the motherboard, screen out the integrated display device on the motherboard, and then troubleshoot after inserting a good display card on the expansion slot (some motherboards may be allowed or disabled by CMOS settings).

Four, integrated on the motherboard of the printer and the port damage

The brand machine and most more than 486 of the microcomputer printer and the mouth, mostly integrated in the motherboard, when using the computer when the cable unplugged printer signal is most likely to cause the motherboard on the mouth damage. In a similar situation, you can view the motherboard instructions and set the screen function on the "shield" motherboard by using the "Disable or allow parallel function on the motherboard" related jumper. The other is shielded by the CMOS settings and then a multi-function card is added to the ISA expansion slot.

Five, the motherboard on the soft, hard disk controller damage

Starting from 486, most motherboards are integrated with soft and hard disk controllers. If the floppy disk controller is damaged, you can also follow the above method to add a multi-function card can be done (change the motherboard on the jumper or CMOS settings); If the hard drive controller is bad, for different situations: if the connected hard disk is less than 528MB, you can add multi-function card; if not, Need to update the motherboard BIOS or take advantage of related software.

Six, the motherboard cache damage

The cache on the motherboard is damaged, showing that the software crashes or cannot install the software at all. You can troubleshoot when the "External Cache" item is set to "Disable" in the CMOS settings.

Seven, the motherboard on the switching power supply damage

The main board of the power supply for switching power supply, the power tube used for separation devices, such as damage, as long as the replacement of power tubes, capacitors and so on.