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Cleared CMOS

By dougvonrodenstein115 ·
I ran a program called clrcmos to clear CMOS and that's exactly what it did. Now there is no video, no drives,(not even A:) and no way back into cmos setup, HELP!

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by sgt_shultz In reply to Cleared CMOS

oh, dear. i bet you are gonna need to reflash the BIOS...the hard part will be figuring out what your motherboard is to get the right one...do you have any documentation? perhaps there is a way to reset the BIOS defaults with jumpers on the motherboard...will that work it the thing is brain-dead?...scrutinize motherboard for clues...there are really good hardware folks here that will help you better...

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by dmiles In reply to Cleared CMOS

If you donot have the motherboard system disk then you have a big problem,go to motherboard manufacturers web site and download the flash BIOS as suggested,you will need a operating system startup disk,insert in floppy drive and boot computer,press designated key to enter setup,you will need all the hardware configurations to be set,before that try setting your configuration back to default settings if this does not work,then proceed to setup configuration manually

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by Ann777 In reply to Cleared CMOS

The following site may or may not help you...

http://www.biosrecovery.com/index.cfm?brcid=support

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by sgt_shultz In reply to Cleared CMOS

wow, great web site Anna777. thanks

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by TheChas In reply to Cleared CMOS

It's time for a manual CMOS reset.

Note: this does not work for laptops.
For most laptops, you only option is the manufactures service center.

Shut down the PC.

Open the case, and look for a clear CMOS jumper.
Set it to clear.
Power up the PC, and then shut it down.
Return the jumper to the Run or Normal position.

You should be at CMOS defaults, and be able to enter BIOS setup.

If you cannot find the jumper:

Unplug the power cord.

Remove the CMOS backup battery.

Let the PC set for at least 1/2 hour.

Replace the battery.

Connect the power cord and boot up.

Again, you should be at CMOS defaults, and be able to enter setup.

The reason this does not work for laptops, is that the BIOS settings are stored in flash memory, and not battery backed CMOS.
As a security feature, there is no user method to reset the flash ROM.
This way, a laptop is of less value to a thief.

Chas

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