No boot after new ram module installation

kenny_login

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Jun 25, 2013
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I just bought a slightly used (enterprise) Lenovo ThinkCentre M57 (Intel® Pentium(R) Dual CPU E2140 @ 1.60GHz × 2, Intel® Q35 , 32bit, Fedora Linux)
The system originally came with 1gb ram module installed. I have several 1gb modules left over from some older M55's I no longer have, so they are compatable. I went ahead and inserted three of these modules, filling up all slots. When I powered on the unit I got error code sequence of 8 beeps and no boot at all (fan was at max). I then removed these newly placed modules and powered on again with successfull boot. I later tried just installing two modules and got no error alarm, but still no boot. I then took out the orig module and replaced with one of the older modules (same exact kind as orig) and it booted up fine. (tried this with multiple mods and all seems well)

I am unsure what may cause this prob. Would anyone have an idea?
 

kenny_login

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Jun 25, 2013
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Thankyou all for your insight. I didn't know that would have been such a problem, as they are the same in appearance and fit in with no problem. So I just need to keep moving them around until I find a workable combination? (some are newer than others, had several of m55's from different sellers)
 

americanbrian

Distinguished
it is not uncommon to have mobos with faulty ram slots. The get a good amount of stress with slotting in/out, especially if you got it second hand you don't know how many times its been swapped/changed. it only take one wire to break its connection and that is the slot screwed....

Also dust build up happens all around the internals of PC's. A slot that has not been occupied fills up real nice sometimes. Some " air cleaner" might fix this...
 

kenny_login

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Jun 25, 2013
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ty americanbrian

I got this system from some enterprise reseller and I was very pleased with the condition, just miinimal cosmetic wear on outside. Inside was shiny and almost new (not for long, old apartment bldg with wooden floors.) But who knows. Could be a bad slot. Would you recommend trying different configs until something works? Or wouold there be an easier way as far as compat is concerned (ie reading the codes on the labels to see what ones are newer than others etc?)
Or would my brother 'the amazing elec engineer' be able to test it somehow with some kind of meter?
 

kenny_login

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Jun 25, 2013
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OK will do. But have to install a few more things first to get that out of the way. Will report back how things went.