Some precautions for motherboard repair As the main board is getting higher and higher, the difficulty of maintenance motherboard is getting bigger and bigger. "Motherboard damage to change the motherboard" is a common method of general computer users to solve the motherboard failure. Now, a motherboard price is 600 ~ 1000 yuan. If you have a little problem, you will be unfortunately. In fact, some faults do not need special inspection equipment, and they don't need to be high-profile professional knowledge. Below, I enumerate some of the motherboard maintenance examples encountered in maintenance work as follows, and the computer DIYER reference is available. First, the CMOS parameter is lost and then prompts "cmos batteryst low", sometimes it can be started, and the use of the dead after a period of time, which is mostly caused by the CMOS power supply. For different CMOS power supply, different measures are taken: 1. Welding battery: Re-welding with the soldering iron to be a new battery. 2. Button battery: Direct replacement. 3. Chip: Replace this chip is best replaced with the same model chip. If the time does not have the same phenomenon after replacing the battery, it is likely to be a motherboard leakage. You can check whether the diode or capacitance on the motherboard is damaged or the external battery can also be used. Second, the keyboard interface on the motherboard cannot use the next good keyboard, and the "Keyboard Interface Error" will be used to start the computer, unplug the keyboard, and re-insert it, start the system normally, use a period of time after using the keyboard without reaction, this The phenomenon is mainly, the multi-pull keyboard causes the motherboard keyboard interface to loosen, remove the motherboard to refold the soldering iron; may also be a charge plug keyboard, causing an insurance electrical block on the motherboard (marked on the motherboard FN's thing), replace a 1 ohm / 0.5 watt resistance. Third, the display adapter failure on the motherboard is generally, the computer is starting a few times, most of which is the motherboard memory is not plugged or display the adapter failure. There is a Great Wall microcomputer, starting 8 sounds, determining the display adapter failure. Open the chassis found that the adapter is integrated on the motherboard and there is no motherboard manual. In response to this situation, you should carefully check the jumper mark on the motherboard, shield the display device integrated on the motherboard, and then troubleshoot after the expansion slot is plugged into the card (some motherboards may be allowed or disabled by CMOS settings) This feature). Fourth, the printer integrated on the motherboard is parallel to damage the brand and most of the 486 microcomputer printers, mostly integrated on the motherboard, and the electrical plug-in printer signal cable is mostly caused by the main board when the machine is used. In case of similar cases, you can view the motherboard manual, and set the parallel port of the "Shield" motherboard by "prohibiting or allowing the parallel port function". The other is to shield through the CMOS setting, and then add a multi-function card in the ISA expansion slot. 5. The motherboard is soft, the hard disk controller is damaged from 486, and most motherboards are integrated and hard disk controllers. If the floppy controller is damaged, you can simulate the above method to add a multi-function card to get a multi-function card (corresponding to the motherboard on the front jumper or CMOS setting); if the hard disk controller is broken, it processes different situations: If the hard drive is less than 528MB, Can add multiple functional cards; if not, you need to update the motherboard BIOS or use the relevant software. 6. Cache on the motherboard damages Cache damage on the motherboard, which is manifested as running software crash or unloading software. You can troubleshoot the "external cache" item to "disable" in the CMOS settings. 7. The power supply on the motherboard is more than the switching power supply on the motherboard. The power tube used is a separation device. If it is damaged, as long as the power tube, the capacitor, etc. can be changed.
