Computer boot appear CMOS Checksum bad how to do?

It is said that many of Asus's motherboards have this problem, especially some low-end motherboards. After the boot, has been the appearance of CMOS Checksum bad.

1, the problem description

After the boot appears the following diagram interface, unable to enter the system. Press F1 into the BIOS, press F2 has been stuck, unable to enter the system, after a while will automatically shutdown. The information above is when the system started, an item in the past, what USB Devices, there is a keyboard, a mouse; What is a DVD, a WDC WD10EADX will be the hard disk. Then there is the CMOS Checksum bad, which means that the CMOS checksum fails. (CMOs is a button cell on the motherboard that is used to power the motherboard)

2, the reasons for the failure of validation may be:

1) Infection virus

2 No floppy drive, open the floppy drive

3 failure of CMOS battery on motherboard

4 motherboard power supply circuit failure

3, infection virus

Can open up, with some anti-virus software, killing under.

4, no floppy drive, open the floppy drive

Press F1 to enter the BIOS page to see if the floppy drive is turned on. Then enter the Standard CMOS Features , found that the date, time is correct, found that also did not open the floppy drive, only WDC wd10eadx-0 (This is the hard disk), and another DVD is DVD, if the floppy drive, then change to The appropriate not detected option.

5,CMOS battery failure

Then there may be a CMOS battery failure, because there is no new battery, can only return to the previous layer, as shown in Figure 1, through the load optimized Defaults option, load the default settings after the boot test. Boot is OK, but not much time after the crash or automatic shutdown, through this method can again boot, but still will die.

So, take the CMOS battery down, and then put it back to the test (for CMOS discharge), such as a period of time (can be a few minutes, can also be half an hour, this sometimes look at the computer, anyway, after the boot into the BIOS, you look at the system time is not correct, if the But still not, then went to buy a new CMOS battery. Battery model is: CR2032 3V button Battery (general supermarkets, digital stores will have, a few dollars)

6. Motherboard power supply circuit failure

You need to check the motherboard on the line, this has no tools, you need to send repair, let others use professional tools to detect.

　　Precautions:

1, CMOS battery failure, to put the battery out for a while discharge, and then put back.

2, computer crashes often strong shutdown, will also cause such problems. Avoid frequent strong crashes and keep your computer alive for longer.