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Windows 7: Problems after Bios Downgrade

26 Jun 2012   #1

Windows 7 Ultimate x64
Problems after Bios Downgrade

Hi Folks,
I own an ASUS P8Z68-V LE Motheboard.
I made an downgrade of the bios. It went OK till the end but when reset the PC after the end of the procedure, the PC won't go. I can see the fans working and the power LED on but nothing comes on the screen and also i do not hear any bios Beep.
Please anybody can help me to solve the problem?
Thanks in advance.

My System SpecsSystem Spec
26 Jun 2012   #2

Microsoft Community Contributor Award Recipient

Windows 7 64 Bit Home Premium SP1

Oh boy. That does not sound good.

A bad BIOS flash can "brick" a computer. Let us now hope that is not the case.

First: try a CLRTC procedure:
  • Shut down the computer > remove the power cord.
  • Remove the 3v battery.
  • Move the CLRTC jumper from pins 1-2 to 2-3.
  • Touch a metal part of the case and Press and Hold the reset button for approx. 30 seconds to discharge all power from the board.
  • Put the CLRTC jumper back on pins 1-2.
  • Replace the 3v battery > replace the power cord > boot.
  • Immediately go back into BIOS and reset all your preferred settings. If the CLRTC worked you will need to reset the date and time.
If you cannot get back into the BIOS after the CLRTC, then your next step will be to replace the BIOS chip.

You can order a chip from ASUS and solder it to the board yourself (or if you are fortunate, the chip will be the plug-in kind), or you can have a reputable service guy do it, or send the board back to ASUS for repair.

Sorry to be the bearer of bad news.
My System SpecsSystem Spec
26 Jun 2012   #3

Windows 7 Pro X64 SP1

Asus has a BIOS restoration utility, but you have to be able to get into the BIOS setup to run it.

Clearing the CMOS (as mentioned by TVeblen) may help. It shouldn't be necessary to remove the battery, but it can't hurt (unless you break something while removing it.)

If all else fails, the Asus e-store sells replacement BIOS chips (programmed with the latest non-beta BIOS) for $15.

ASUS eStore

The replacement should be fairly easy; it's a small dual inline package (socketed). You may want to buy a chips puller, though.

The e-store only serves the US and Canada.
My System SpecsSystem Spec

27 Jun 2012   #4

Windows 7 Ultimate x64

Thanks guys for your help.
TVeblen unfortunately your suggestion did't work.
For both of you:
Can you tell me where the Bios is placed on the Mainboard?
i had a look on the mainboard and found one small chip on
a socket.Could it be the one?
On the chip i can just read WINBORD.
I have an eprom programmer EP32 by Grifo.
Can i re programm it?
If yes which file to use?
thanks in advance to both for the help
My System SpecsSystem Spec
27 Jun 2012   #5

Microsoft Community Contributor Award Recipient

Windows 7 64 Bit Home Premium SP1

From Page 1-11 in your manual:

Problems after Bios Downgrade-capture.png

I don't know if you can use the EP32 program.

My System SpecsSystem Spec
27 Jun 2012   #6
Victor S

Windows 7 Ultimate x64

Good luck with however you approach this. I've always stayed away from flashing firmware - except my Nuvi GPS - so can't offer much advice beyond what you already got about clearing CMOS.
But don't get discouraged.
New Bios Chip Asus P8Z68-V LE | eBay

If you do this, you might want to buy a chip puller - they're cheap.
My System SpecsSystem Spec

 Problems after Bios Downgrade

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