Pc not opening at the begging after several trails on black screen coming :overlocking or overvoltage failed! F1 for default BIOS after it system start normally but next time at the beginning the same story and nad PC

SOURCE: OVERCLOCKING

Hi, On other motherboard models of Asus, similar problem was corrected by: 1. Updating the BIOS; 2. Actually overclocking the FSB to slightly higher than default (say 170 or 175 from 166, 140 to 150 from 133); 3. Slightly increasing the default processor voltage supply by increments of 0.05; 4. Replacing the 3.0 volts Lithium battery; 5. Replacing the memory to next higher speed; Never had problems like this with MSI, ECS or Intel boards. Hope this be of some idea/help. Post back how things turned up or should you need additional information. Good luck and kind regards.

SOURCE: New CPU installed Message

It will probably be your cmos battery that is flat and losing the saved settings, this can be located on the motherboard, it is a flat disc shape (CR2032)

SOURCE: Do I really need a floppy disk to do an upgrade bios?

Hi dragon512,
mewms & I both know you are a bit green. Doing a flash on your board will most likely kill your bios. Only people with a bit more technical know how attempt flashing a bios.
Neither of us knows, at the moment if your bios even needs to be flashed.
So before you jump lets walk a little...........
If you have windows XP home installed & it is not completly updated when you press the reset button on your case there is a good chance your PC will not shut down or restart like a WinXP Pro system will. Win XP Pro will shut down window correctly.
XP Home will cut windows off & restart your PC. That is why you are getting;
Press F1 to Run SETUP Press F2 to load default values and continue.
I'll bet you when you press F1 windows run's checkdisk every time!
If you want to restart your computer you click the Start button, than click shut down. A pop-up loads in the center of your desktop & you click what you want your PC to do.
Shut Down or Restart or Standby. Than you click on it.
I promise if you stop touching the reset button on your PC and let windows do the work for you.
Your PC will run just fine.
A bit of information about Asus. A new (updated) bios cost $5.00.
The call to Asus to order the new bios will cost less than $3.00.
Shipping will cost you about $1.50. Far less than a floppy drive or a USB drive.
Asus number for a new bios: 510-739-3777
Turn on your monitor, than turn on your PC. As soon as you see video display press the Pause/Break key on your keyboard. That will freeze your system so you can look at your screen. Listed there is the bios version. Write is down on paper.
Than go to Asus for your board. Click the link I have posted:
http://support.asus.com/download/download.aspx?modelname=P4S800D-X&SLanguage=en-us

Click the + sign to the left of BIOS. Check what you have written down to what is on Asus web site. It is recommended never to flash a bios unless there is something a new bios will fix. Keep that in mind.

If you have more questions feel free to ask.

Good Luck & Kind Regards.

SOURCE: I am using Asus M2N68-AM Plus motherboard and AMD

dude check out if any part is overheating using speedfan software
if not check if your PSU can take the load of your PCparts

SOURCE: Bad BIOS checksum.... CMOS bad checksum errors

BOOT BLOCK COMPATIBLE VERSION VER .005
BAD BIOS CHECKSUM

CHECKING FOR CD ROM
READING FILE "P5SD2VM.ROM"
READING FILE "P5SD2VM.ROM"
READING FILE "P5SD2VM.ROM"
READING FILE "P5SD2VM.ROM"
READING FILE "P5SD2VM.ROM"
NO CD-ROM FOUND
CHECKING FOR FLOPPY DISK
READING FILE "P5SD2VM.ROM"
READING FILE "P5SD2VM.ROM"
READING FILE "P5SD2VM.ROM"
READING FILE "P5SD2VM.ROM"
READING FILE "P5SD2VM.ROM"
NO FLOPPY DISK FOUND

Does someone already fix this problem??????