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Author Topic: BIOS ROM Checksum Error  (Read 13950 times)

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Geek-9pm


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Re: BIOS ROM Checksum Error
« Reply #15 on: February 21, 2011, 08:47:47 AM »
We have conflicting information.
Is it really a ROM check sum error?
Is so, why did the thing not HALT?

This happened after he did a flash.
True or False?
The flash never can cause a error in the ROM area.

patio

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Re: BIOS ROM Checksum Error
« Reply #16 on: February 21, 2011, 08:50:46 AM »
Quote
The flash never can cause a error in the ROM area.

This is wrong...
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Geek-9pm


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Re: BIOS ROM Checksum Error
« Reply #17 on: February 21, 2011, 09:16:21 AM »
Quote
    The flash never can cause a error in the ROM area.

This is wrong...

OK, That sounds credible. 
Is so, it would be a catastrophic failure?
That is, not a soft error that can be recovered by trying the flash again?

Would it hurt to try the flash again?

BC_Programmer


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Re: BIOS ROM Checksum Error
« Reply #18 on: February 21, 2011, 09:45:15 AM »
And many EEPROM's if flashed incorrectly cannot be reverted back by re-flashing....some can...most can't.

They all can. The only point of contention is that generally there is no way to do that without a working BIOS.

That's what the backup "emergency" BIOS ROM's are for. In this case the main ROM is corrupted (or more precisely, it refuses to use it) so it's booting up to the special BIOS designed with the specific purpose of facilitating a floppy-based flash (thus why it requires a diskette)

All EEPROMs are re-flashable. It's right in their name- Electrically Erasable.

What is needed is what I noted previously. a Diskette with the appropriate Award Flash utility and the correct BIOS .BIN file for the machine. (I'm not sure wether that particular backup ROM will actually attempt to boot to the diskette or perform the flash immediately)

http://www.birdjanitor.com/bootblock.html

It seems I was wrong on a few of the speculations I made regarding the bootblock; it's not actually on a separate chip, but is on the same EEPROM as the normal BIOS code; however, very few flash procedures write to it. Also, we can say with 100% certainty that there is no problem with the boot block, since it is clearly working and trying to do exactly what it was designed to.

In any case, the link above provides some information on what procedures to follow to get the BIOS flashed properly.

Also, let this be a lesson that updating the BIOS for no reason is a great way to waste a weekend.
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patio

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Re: BIOS ROM Checksum Error
« Reply #19 on: February 21, 2011, 10:00:17 AM »
Quote
Also, let this be a lesson that updating the BIOS for no reason is a great way to waste a weekend.

Quote of the Month Award...
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Re: BIOS ROM Checksum Error
« Reply #20 on: February 21, 2011, 01:32:26 PM »
The OP did not give make and model of his machine and details of how he flashed it. He mentioned HP. Here is a quote off their site.

Quote
2009-08-27 , Version:F.54 A, 3.83M (‏Previous versions available)‏
This package contains the WinFlash Utility and a System BIOS image for the supported notebook/laptop models and operating systems. The WinFlash Utility is used to locally flash the System BIOS (ROM) on notebooks/laptops operating in a Microsoft Windows Vista environment.

http://h10025.www1.hp.com/ewfrf/wc/softwareCategory?os=4062&lc=en&cc=us&dlc=en&sw_lang=&product=3966262#N395
Note the phrase ... locally flash the System BIOS (ROM) on notebooks/laptops ...
So what does that mean?

Salmon Trout

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Re: BIOS ROM Checksum Error
« Reply #21 on: February 21, 2011, 01:35:34 PM »
locally flash the System BIOS (ROM) on notebooks/laptops ... So what does that mean?

I imagine it means you can flash the chip in the computer rather than remove it and put it in a eeprom programmer.


« Last Edit: February 21, 2011, 01:48:47 PM by Salmon Trout »

Fed

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    Re: BIOS ROM Checksum Error
    « Reply #22 on: February 21, 2011, 04:27:59 PM »
    I believe it means you can flash it from within windows rather than flashing from a floppy, obviously earthgirl can't flash through windows though.