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A21m CRC

 
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steve5214
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Joined: 07 Jan 2006
Posts: 61
PostPosted: Sat Jan 28, 2006 11:07 pm    Post subject: A21m CRC Reply with quote
Hi Victor,
Ok...I have a Thinkpad A21M with a corrupt bios (just bought from ebay). I have an eeprom programmer capable of writing to a 24rfo8 chip. The problem is, what do I actually write to the eeprom. I can download the bios from IBM but which file from the floppy is the file I need...

$016D000.FL1 - bios rom I suspect
$016D000.FL3 - platform info I suspect

and is it as simple as renaming the bios.rom file as .bin and then writing to the eeprom ?

Thanks for any info...or advice
Cheers
Steve.
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victor
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Joined: 07 Mar 2004
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PostPosted: Sat Jan 28, 2006 11:18 pm    Post subject: Reply with quote
24RF08 is not the BIOS. Of course, you can download the BIOS from IBM but I don't think they publish 24RF08 contents Smile.
How is the BIOS corrupt? I hope you are not talking about BAD CRC1 or CRC2 because that's not the BIOS.

Else, I can only give relations about my writing software, sorry.
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steve5214
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PostPosted: Sun Jan 29, 2006 1:50 pm    Post subject: Reply with quote
Victor,

The laptop stall's/freezes at the ibm startup screen, after a few searches I found this problem seems to be a common problem on A21M's and is due to corrupted bios. So thought the solution would be to buy a bios programmer and just reflash the bios with a fresh copy of it.

Cheers
Steve
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victor
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PostPosted: Sun Jan 29, 2006 3:50 pm    Post subject: Reply with quote
I've never seen a corrupted A21m BIOS so far, though. As I said BIOS is not CMOS and CMOS is not the 24RF08.
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steve5214
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Joined: 07 Jan 2006
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PostPosted: Sun Jan 29, 2006 5:23 pm    Post subject: Reply with quote
Victor,

I am a little confused now...but thats not hard to do.
So what do you recomend I do to recover the laptop ?

Cheers
Steve.
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victor
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PostPosted: Sun Jan 29, 2006 9:18 pm    Post subject: Reply with quote
Steve,
If you have CRC errors, the laptop can be recovered but you must be sure your laptop doesn't have a power problem.

Else, the CRC recovery service is available only with the writer license.

This kind of matter I will discuss in private so feel free to email me.
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