Help...Removed CMOS Battery and now I have no OS

dave8624

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Nov 25, 2006
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I had to remove my CMOS battery on my ASUS P5N32-E mobo bkz of an overclocking error before post and now after post its says, "DISK BOOT FAILURE, INSERT SYSTEM DISK AND PRESS ENTER"

Please help....
 
When you reset the CMOS, BIOS settings go to default, including such things as boot order, SATA settings, etc. Go into BIOS and set your boot order so that the HDD with your OS is first. If you have RAID setup, you'll need to change from default settings to boot as well.
 
This is because when you take out the battery the bios goes back to default settings. The default settings probably look to another drive to boot from before your hard drive. If the Drive it is looking at has a non-bootable disk in it, you will get that error. I would guess that it looking at your floppy drive and you have a disk in it.

You have 2 choices. Either remove all disks in all drives and try again, or
2. Just change the boot order to look at your harddrive first.

Remember, your primary hdd is probably labled as hdd-0 not hdd-1, consult your mobo manual to make sure