Computer power-on appear CMOS Checksum bad how to solve?

　　 I. Description of the problem

After the boot appears the following diagram interface, unable to enter the system. Let's look at the last two articles:

Try pressing F1 to enter the BIOS,

and press F2 but has been stuck, unable to enter the system, after a while automatically shutdown.

　　Second, the analysis of information

The above information is when the system is started, we have an item to analyze.

The first sentence: DRAM Frequercy for DDR3 1333 ... Clearly refers to memory, DDR3 1333 is the memory model.

The second sentence: 1 AMD North Bridge, Rev C3 obviously refers to AMD's motherboard

The third sentence: Initializing USB controllers ... Done. Is the idea of initializing a USB controller.

The third sentence: USB Device (s): 1Keyboard, 1Mouse is the introduction of the current device plugged in USB, with 1 keyboards, a mouse.

The fifth to sixth sentence: Auto-detecting SATA5 ... ATAPI CDROM, SATA3 ... Hard disk is clearly referring to the DVD's optical drive and hard drive. The following seven, eighth sentence specifically said the DVD optical drive model and hard disk model.

Finally, we see the most important information is "CMOS Checksum bad", that is, CMOS checksum failure.

(CMOs is a button cell on the motherboard that is used to power the motherboard)

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

1. Virus infection

2. No floppy drive, open the floppy drive

3. Failure of CMOS battery on motherboard

4. Motherboard power supply Circuit failure

　　Iv. infection of the virus

This situation, you wait for a while to boot, should be able to start up, but with a moment will be turned off. So in the open up, with some Jinshan poison pa antivirus software, killing. If there is no virus trojan problem. And then proceed down.

　　V. What to do if you can't boot

What if you can't turn it on in a short time?

Press F1 to enter the BIOS page, 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.

　　Check if the floppy drive is turned on

1). Press F1 to enter the BIOS page

2). Then enter the standard CMOS Features

The date and time were found to be correct, and in the list below you can see that there are WDC wd10eadx-0 (this is the hard disk), and another ATAPI DVD D DH is a DVD and does not have the floppy drive turned on.

If the floppy drive is turned on, press ENTER on this option and the floppy drive is turned off by changing the option to the appropriate not detected option. (Because we don't have a floppy drive in our current computer)

　　Seven, CMOS battery failure

Because did not open the floppy drive, so continue to check whether the CMOS battery failure, so, to open the mainframe box, the inside of the CMOS battery down (the main box can be seen in the round button battery), and so on after a period of time to put back (this is to carry out the CMOS discharge).

Can wait a few minutes, also can 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 wrong means discharge success. If not, you can buy a new CMOS battery. Look at your battery model, generally are: CR2032 3V button batteries (generally large supermarkets, digital stores will have, a few dollars)

　　Eight, motherboard power supply circuit failure

If this is still not the case, it needs to check the motherboard on the line, there is no tool, you can only send repair, let others use professional tools to detect.