Bios Flash gone wrong ... P4SD-LA

April 21, 2009 at 20:36:54
Specs: Windows XP
Hey guys, I think I have an issue that isn't able to be corrected, but perhaps someone can tell me why this happened. I've done BIOS Flashes several times, but this one has me stumped on why it failed.

I have a HP computer with the P4SD-LA ASUS board and needed to update the bios due to an issue with it not wanting to allow an install of Windows XP. (0x000000A5)

The flash went fine until the reboot. When the machine was rebooted the HP Bios screen flashed for a second and then a display of different colors and blanked out. Board doesn't even post now.

Is it recoverable? I doubt it, but not sure at this point. And if not, what would have caused this issue?


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April 21, 2009 at 21:47:58
If you have both an on-board video port and a video card, try using the other one.

Otherwise, was this an update during a windows session or a boot-from-a-floppy update? If the latter try it again. If the former see if they have a floppy update version.

Oh, and make sure you used the correct one for your motherboard.

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April 22, 2009 at 04:50:25
I doubt you needed a BIOS flash. HP flashes are generally performed from within Windows & the description of the latest update assumes XP is already installed.

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April 22, 2009 at 06:46:22
I should have added that the A5 Stop Error was also on XP Boot up. The Start Windows Normally screen would appear, no safe mode, or normal windows, just the bsod.

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April 22, 2009 at 07:51:20
I don't know about HP BIOS flashes but normally after a BIOS flash your must immediately enter the BIOS on the next boot and reset values as required. Did you do that?

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April 22, 2009 at 08:25:42
If you don't have a floppy drive connected to the mboard, connect one.

When you have a floppy drive connected, while booting,
- if the led on the front of the floppy drive comes on for a while AFTER the usual brief flash you always see while booting, the flash chip is probably okay, the boot block portion of the bios code is still there, and you can attempt to flash it again.
- If the led on the front of the floppy drive DOES NOT come on for a while AFTER the usual brief flash you always see while booting, the flash chip has probably physically failed when you attempted to flash it. In that case you can't flash it again, and your mboard is useless until you replace the flash chip.
If the flash chip is in a socket so that it is removable, you can replace the flash chip with a new one that has already been flashed , and the mboard will work fine again. The cheapest way to do that is to get a new bios chip that has already been flashed with the latest manufacturer's bios update from a vendor on the web.
If the flash chip is soldered into the mboard, there are a few vendors on the web that can expertly reove it and replace it with a new one that has already been flashed, but the charges for that including shipping there and back are often more than a new or used mboard of the same model.
can do that, but that service is ONLY if you are in the US.

Regarding your 0x000000A5 error.

You've always got to keep in mind that STOP errors can be caused by many things, and often the message is displayed because something else is wrong but Windows can't tell you directly what the problem is, so the primary cause or causes of the error don't actually apply.

Whenever there is a suggestion that you may need to flash your bios, 99.9% of the time, that's not actually necessary, unless release notes for the bios version actually say they will cure a problem you are having, or will support newer cpu types, etc.

You are taking a big risk when you flash your bios - if the flash fails, and/or the flash chip physically fails while flashing (this is COMMON - these cheap flash chips can only be flashed an unpredictable small number of times), you will have a mboard that will not boot.

This Microsoft article lists many reasons you may get this error - some can be indicated by the particular code strings you are getting.
"Stop 0x000000A5" Error When You Are Installing Windows XP

However, when I look at many "hits" you get when you search using: Stop 0x000000A5
I find it can be caused by

- if you get it while attempting to install XP
- your mboard bios ACPI support actually IS not compliant with XP's support of ACPI - however, that's extremely unlikely to actually be the case unless the mboard model is OLDER than when XP was first released (2001?) , which DOES NOT apply to your mboard model
- ram problems - try re-seating the ram, if you just added ram, remove it and try the ram that previously worked fine -test the ram with a memory diagnostic, fix what is wrong with that
- when you have certain devices installed that did not come with the mboard - unplug everything including cards in slots not necessary to run Setup while running Setup

- if you get it after Windows has been installed
- when you have certain devices installed that did not come with the mboard - try removing the device(s) you added to see if the problem goes away
- after you have used some repair program, or have used an anti-malware program to remove something - in that case running a "Repair install" of Windows procedure usually fixes the problem.

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April 22, 2009 at 11:52:38
Your comments in #3 above--was that before or after the bios flash?

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