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Hi,
I had an old H-IG4-uatx board in Compaq/HP 500B and thought I would try this bios mod with a view to trying a better cpu in it (current cpu is Celeron E3200).
The original bios version was 5.09 27/11/09 Core ver 08.00.15 Compa 500B Microtower
Firstly I tried the ver 6.05 sp50200.exe update for HP 500B MT from HP support site (straight run from windows). This failed with invalid ROM id error message.
Next I tried the ver 5.13A sp48295.exe update for Compaq 500B MT from HP support site (straight run from windows). This worked ok.
Encouraged I then tried the Ver 6.10a modded bios as per post #1 using AFUDOS 4.33 on usb stick method. On first attempt (AFUDOS switches /p /b /c) I got the invalid ROM id error message. I then added the /x switch to override ROM id check and rom was flashed. On booting system it was obvious all was not well ;-( Pressing F10 to try an get into bios setting just produced a screen with "Wait ..." message in centre which never progresses (could stiil boot into windows 7 ok though).
Decided I should revert to ver 5.13A (which worked correctly). However trying to flash this with either the sp48295.exe via windows or AFUDOS fails with error message "BIOS is write protected". So seems somehow the ver 6.10a flash has turned on bios write protection and I am unable to flash any bios now!.
So a number of questions:-
1. Is there any method to remove this unwanted bios write protection? I only see 2 jumpers on the board - one is cmos clear the other I have not found any info and it is not marked on pcb.
2. What caused this problem - thinking maybe the AFUDOS switches were not correct? or are there different version of this motherboard HP/Compaq/Foxconn which are slightly different/incompatible bioses (my board is screen printed H-IG4-uatx by cpu socket).
Any help or suggestions most welcome.