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Help diagnosing X22 motherboard problem (Error 0175)

X20/X21, X30/X31, X40/X41 Series
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Help diagnosing X22 motherboard problem (Error 0175)

#1 Post by nfraser01 » Wed Sep 06, 2023 1:14 pm


I've acquired another "faulty" ThinkPad!

Seller describd as faulty but "boots to BIOS". When I unpacked I noticed there were a load of screws missing - always a bad start :-)

Anyway, initial propblem seems to have been with the RAM module as it would not boot at all except with a 1-3-3-1 beep code. Once the module was removed it would start to boot, but now stops with a "0175: Bad CRC1, stop POST task" error. I've changed the CMOS battery for a known good one, but the problem persists. Pressing F1 (as prompted) causes the system to hang.

An IBM diagnostic document suggests "The EEPROM checksum is not correct (block #6). Have the computer serviced." is the fix. Would this happen if there had been a failed BIOS flash/update? Other than a faulty BIOS or motherboard, are there any other likely explanations?


tom lightbody
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Re: Help diagnosing X22 motherboard problem (Error 0175)

#2 Post by tom lightbody » Wed Sep 06, 2023 5:51 pm

I've had this problem. I suggest you find the

"Thinkpad Maintainance Diskette v.1.75"

or any version, really. Does various things: maybe re-write the EEPROM.
A search provides numerous places to look.
the way up and the way down are the same (heraclitus)

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