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Variable speed fans suddenly slow single speed only.

IBM ThinkCentre M50 model 8188
All 3 cooling fans (CPU, PSU, Case) operate only at a single low speed. All fans are variable speed and until just recently could be heard varying speed depending on temperature. Nothing changed or modded on PC... one day the fans were varying, now they're not. Oh, also, when the PC goes on standby, the fans now don't switch off ... previously they used to. Any thoughts where to look how to identify / fix problem.

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Check with the temperature of the CPU core!
because of over heating the CPU is shutting down or not.

Posted on Sep 24, 2009

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