Common motherboard Troubleshooting

Due to motherboard reasons, this type of failure is typically due to damage to the motherboard or damage to the BIOS caused by the CIH virus. After the general BIOS is damaged by the virus, the data in the hard drive will be lost, so we can determine whether the BIOS is damaged by detecting the hard drive data intact.

　　First, no display on the boot

Due to motherboard reasons, this type of failure is typically due to damage to the motherboard or damage to the BIOS caused by the CIH virus. The general BIOS after the virus destroyed the hard disk data will be lost, is that we can detect the hard disk data is intact to determine whether the BIOS is damaged, there are two reasons for this phenomenon:

1, because the motherboard expansion slot or expansion card problems, resulting in plugging such as sound card and other expansion cards after the motherboard does not respond without display.

2, for the current jumper-free motherboard, if the CPU set in the CMOS frequency is not correct, may also cause the failure to display, as long as the elimination of CMOS can be resolved. Clear the CMOS jumper is typically near the lithium battery on the motherboard, its default position is generally 1, 2 short circuit, as long as it is changed to 2, 3 short-circuit a few seconds to solve the problem, for the old motherboard if the user can not find the jumper, as long as the battery off, to boot display into the CMOS settings after the shutdown, The battery is also up to the purpose of the CMOS discharge.

For failure of the motherboard BIOS to be compromised, we can plug in the ISA video card to see if there is no boot screen, you can make an automatic update of the BIOS of the floppy disk, refresh the BIOS, but some motherboard bios is damaged, the floppy disk drive does not work (as far as I know, the motherboard is such a startup), At this point, you can try to use hot plug method to solve, however, according to my personal experience, the use of hot-plug extraction requires the same BIOS may also cause some components of the motherboard damage, so the reliable method is to use the write-code device to write the BIOS update files inside the BIOS (maintenance of the mobile phone is generally a place to write the code device).

For motherboard damage, some may be due to the motherboard with a long battery leakage caused by the circuit board moldy (for the old motherboard), so that the motherboard does not work, we can thoroughly clean it to see if the problem can be solved, this method also on the motherboard of the contact of the socket is not good for root.

Cleaning method: Use the tool to unplug the BIOS on the motherboard, CMOS battery, and then use the hard hair brush, washing powder, the parts of its thorough cleaning, and finally rinse clean with tap water, to the motherboard shade after the test (I used this rule of law better than a few motherboards, and found no sequelae).

　　Second, motherboard COM port or parallel port, IDE port damage

This type of failure is generally due to the user charged plug related hardware, at this time the user can use multi-function card instead, but in lieu of the motherboard must first be banned from the COM port and parallel port (some motherboards even IDE port to prohibit the normal use).

　　Three, CMOS settings can not be saved

This type of failure is generally due to the motherboard battery voltage is not caused by the replacement can be, but some of the motherboard battery replacement can not solve the problem, at this time there are two possible:

1, the motherboard circuit problems, to find professional maintenance;

2, the motherboard CMOS jumper problems, and some because of human failures, the motherboard on the CMOS jumper set to clear options, so that the CMOS data can not be saved.

　　Four, in Windows download into the motherboard driver after the crash or CD drive read disk speed slowed the phenomenon

In some non-brand motherboards I have encountered this phenomenon many times, the motherboard driver installed, restart the computer can not be in normal mode into the Win98 desktop, and the driver can not be uninstalled under Windows98, so that users have to reinstall the system.

In some magazines it is seen that loading the motherboard driver can increase the speed of the host, some articles to enhance system stability, but in my five years of experience in computer maintenance has not felt this matter, in my personal experience, unless there is a device conflict under the Win98, there is no need to install the motherboard driver.

　　Five, the mouse is not available when you install Windows or when you start Windows

The software causes for such failures are generally as follows:

1, CMOS Setup error. There is a modem use IRQ item in the power management bar of the CMOS settings, and his options are 3, 4, 5, ..., NA, typically its default option is 3, and it is set to an interrupt other than 3. Such failures are generally common in older 586 PCs, and modern motherboards generally do not appear to be such a phenomenon.

2, in some of the older 586 computers on its COM port and LPT port is relying on a signal cable connected to the chassis outside, its COM port signal connector with the motherboard is different, the method is also different, if the wrong connection will also lead to the mouse is not available, it is generally followed by the following two kinds: 1, The signal lines are connected to the connection head in sequence 1 to 9. 2, the signal line and connection point cross connected, the connector above a row of connected signal Line 1, 3, 5, 7, 9, the following row is 2, 4, 6, 8.

　　Six, the computer frequently freezes, even if in the CMOS setting also will appear freezes the phenomenon

In the CMOS crash phenomenon, generally for the motherboard or CPU problems, if the dismount can not solve the fault, it will only replace the motherboard or CPU.

This type of failure is generally due to the motherboard cache problems or poor design of the motherboard, the author on the elegant 815EP motherboard has been found due to the motherboard cooling is not good enough to cause the failure of the phenomenon. After the crash, touch the CPU around the motherboard components, found the temperature is very high and hot. After the replacement of high-power fan, the crash can be resolved. For cache problems, we can enter the CMOS settings, the cache will be prohibited after the smooth solution to the problem, of course, after the cache is prohibited speed that will certainly have an impact.

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