Analyze the cause of the fault. It may be that after entering the summer, the humidity in the air is large, and he wants to strengthen the ventilation and heat, so the chassis is opened, resulting in rust of the battery contact point, resulting in poor contact, making the BIOS settings. I can't save it properly, but I didn't make the settings completely lost, so I didn't prompt the BiOS settings to be lost when I booted up.
Third, the motherboard battery will not cause the computer does not start
Symptom: small series of friends of a computer, recently there has been a failure: press the power button, the computer nothing happens, repeatedly press The lower power switch is still inactive. After preliminary analysis, it is very likely that there is a problem with the power supply. It is not enough power (the "patent" of the inferior power supply) is that the switch has a short circuit. After counting the numbers, you will take all kinds of tools and go straight to your friend's residence.
Fault Analysis: As friends of the fault, no matter how pressing the power switch (socket contact and good electrical verify), wood, like a computer as "motionless." The computer does not have any alarm sound, the motherboard does not seem to be loaded with the required voltage at all, and the power supply fan does not move. It seems that the computer cannot be powered at all. Open the case and check the connection between the motherboard and the power supply. There is nothing abnormal. There is no sign of short circuit at the power switch. The connection of other accessories is tight, and the fault is still turned on again.
As the "suspect" the greatest power, so the system's home Xiaobian decided to use replacement method to verify, just happen to have a power of 250W, dress up, the computer still "silent"; Is this 250W The power supply is also "Li Gui"? At this point I noticed that there are four IDE devices in the chassis: two hard drives and two optical drives. My friend said that it was just upgraded. It seems that it is caused by excessive power supply. I immediately unplugged the power of two of the devices and tried to boot again. The computer still did not respond.
Just ready to give up on the occasion, the computer's power supply fan suddenly turn up, will hear the sound of the hard drive self-test, the display slowly became brighter, the computer starts up! But in a short while, the startup is interrupted, display "CMOSLoadFailure", and prompt to press "F2" to continue to boot, press "Del" to enter BiOS settings. Regardless of it, press the F2 key first to let the system continue to boot, but in any case, you can't enter the Windows XP desktop and have to restart.
the press "Del" key to enter the BIOS setup, buddy was going to enter the password, but directly into, and found time positioning system in January 1999, when 0 1 said in view, it is clear The CMOS battery is dead. I immediately bought a new battery into it, and connected all the devices to boot again. The computer started up smoothly, but still displayed “CMOSLoadFailure”, I had to enter the BIOS setting and select “LoadBiOSSAFEDEFAULTS” and restarted. This time I successfully entered the WindowsXP desktop. Everything is back to life. Just thinking that the problem has been solved, my friend suddenly found that the floppy drive icon is gone, the system did not recognize the floppy drive! I started to think that it was possible to touch the floppy drive connection, so I couldn't help but open the case, but I still couldn't see the floppy drive. After calming down, I thought of the operation "LoadBIOSSAFEDEFAULTS". Is it the default to set the floppy drive to "None"? Restarting into the BiOS settings, I proved my idea and immediately changed it back. The floppy drive can be used again.