Bad Bios Checksum, after flash Bios, Recovery Fail

Custom / P5K-VM
January 29, 2012 at 16:59:27
Specs: Windows XP Home, 2.793 GHz / 2 GB
I had error when i turn my PC on everytime, that new CPU installed, Please enter setup to configure system. I enter system, load defaults, same msg after reboot. I read on another post that updating the bios will help. So i checked manufacturer website for new bios update, there was 1 and it said new CPU's added. So thought good, that will fix my problem. Entered into Bios and flashed it. PC rebooted, then i get the msg Bad Bios Checksum. Starting Bios Recovery... Check for CD-ROM not found!, Checking for USB Device not found! and repeats checking for devices.

How do i fix this?


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#1
January 29, 2012 at 17:31:26
After flashing the BIOS you need to enter the BIOS setup screen and reset parameters and save them. This will generate a new BIOS checksum which will slso be saved.

Just flashing the BIOS and not saving the new parameters will mean that the BIOS is still working on the old checksum.

Stuart


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#2
January 29, 2012 at 18:15:04
Can't get to the bios screen, first thing that appears is the bad bios checksum, recovery.

I'm getting a new 700w PSU 2morro, after reading some posts. Also tried clearing the cmos, by moving the jumper, and also removing battery for 10mins. No change.

So must be motherboard problem or PSU not strong enuff, unless anyone else has ideas.


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#3
January 29, 2012 at 18:40:02
You are not pressing the necessary key fast enough. If there were a motherboard problem or PSU problem you would not even get the Checksum error message.

You need to start tapping the right key, usually Del or F2 as soon as anything appears on the screen.

Stuart


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Related Solutions

#4
January 29, 2012 at 19:23:57
Unplug the power cord & reset the BIOS by using the Clear_CMOS jumper.

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#5
January 29, 2012 at 20:02:17
The original problem sounds like just a bad cmos battery. Replace it if you haven't already. Your power supply doesn't need to be replaced. Then pray you can get into cmos/bios setup and make the necessary corrections and didn't mess things up with a bad bios flash. Be sure to set the date and time.

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#6
January 30, 2012 at 00:31:33
I thought if was bad cmos battery it wouldn't hold the time. But this battery does. Gonna try what StuartS said. Will post back results

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#7
January 30, 2012 at 13:08:03
Another one bites the dust.

A Pit Bull is like a gun you can pet. And there is no safety on it.


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#8
January 30, 2012 at 15:04:29
Can't enter Bios Setup by pressing Del key as soon as i press power button on case. Goes straight to the error msg. Tried multiply batterys, and clearing cmos doesn't work. Still waiting on a bigger PSU to arrive.

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#9
January 30, 2012 at 19:36:19
Bigger PSU didn't work either... Im lost at what to do now

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#10
January 30, 2012 at 23:16:23
The original problem was probably the battery. That is, if you had replaced it at that time and configured bios setup, all would likely now be OK. Replacing the battery now was the right thing to do but it's not going to fix a possible bad bios flash.

Check the motherboard manual or its support site and see if you followed the proper procedure, used the correct bios and see what it says about bios recovery.


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#11
January 31, 2012 at 23:59:49
Replaced the Motherboard and now the PC works. Even tested the old cmos battery in it also, still works. So was a faulty motherboard.

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