Thinkpads Forum

I had a 600X-450 here which I had been using happily for a while, but the speed bug bit me, and I bought an MMC-2 650Mhz CPU from ebay.

I have taken the machine apart before, and so it was pretty routine. Power disconnect, battery out, fan connector disconnect, remove the various items which prevent a smooth linear outward extraction of the module.

Old CPU out, carefully insert new CPU, reattach all connectors, insert battery, power on.

Nothing. Zero boot. Not even any screen flicker.

Bad module?

Swapped back to the original CPU. Redid all connectors again. Power on.

Nothing. Again.

Oh, feathers.

Looked at the connector pinout of the new CPU. Superficially okay -- but, on very close inspection, light glinted on some pins but not on others. Slight bending? Got a magnifier headset on and inspected. Yes. One horizontal (short way across the connector) row had bent pins. Not severely, a few degrees of arc, but bending nevertheless.

I checked my original CPU. Fine. No bending even under high magnification.

Thinking that I had nothing to lose, I straightened the pins on the new CPU using a jeweler's forceps. Tried it again. No boot. Tried the original again. No boot.

My suspicion here is that the misaligned pins on the new CPU have caused a short and killed the motherboard. Does that sound familiar? Have others experienced that failure mode?

Or is there some other reason which I may be overlooking?

Thanks in advance for any feedback!

happed to me too,ask the culprit trader for full refund and compromise for a replacment mobo /if your not satisfied with their compromise to salvage for dead mobo,
get em back by imlpying say 2-3 of the 5 cpu they sent are faulty to recoup time out of your life then imply a massive charge to send them back ,if they expect the returns(that way they just say keep the damm things) and then your compromised
gods way or my way.
culprits deserve to be scammed,with exception to them that realise their mistake and make appropriate ammendments to resolve the issue prior to hand.
quality traders always pretest a used component thouroughly in windows/linux enviroments before listing it for sale,
in god we all trust but to all others always througroughly inspect cpu's first.

Chris Thorne wrote:Or is there some other reason which I may be overlooking?

Thanks in advance for any feedback!

Did you have the MB completely out of the lower case when you attempted the transplant?

It's all too common to over-flex the MB when inserting the new MMC2 card and break a trace or two on the bottom if the MB is still in the lower case.

(DAMHIKT!)

Regards,

James