After a power outage, Dell Optiplex 760 won't start. Power LED flashing amber.
Suspect bad caps.
Crack open the power supply, and sure enough. there are.
C60 2200/10V > 2200/16V (Old cap measured 22uF & ESR 4.1)
C107 2200/16V LPZ > 2200/16V (Old cap measured 2244uF & ESR 0.01) <Wow
C114 680/16V > 1000/16V (Old cap measured 2uF & ESR 13.4)
C119 2200/10V > 2200/16V (Old cap measured 333uF & ESR 1.61)
On small board for fan, 100/25V > 2*47/25V (Old cap measured 0uF, ESR 30). I don't have any 100uF on hand so I twsited two 47uF together and soldered it in.
Computer is back up and running.
Hope this helps someone in the future.
Suspect bad caps.
Crack open the power supply, and sure enough. there are.
C60 2200/10V > 2200/16V (Old cap measured 22uF & ESR 4.1)
C107 2200/16V LPZ > 2200/16V (Old cap measured 2244uF & ESR 0.01) <Wow
C114 680/16V > 1000/16V (Old cap measured 2uF & ESR 13.4)
C119 2200/10V > 2200/16V (Old cap measured 333uF & ESR 1.61)
On small board for fan, 100/25V > 2*47/25V (Old cap measured 0uF, ESR 30). I don't have any 100uF on hand so I twsited two 47uF together and soldered it in.
Computer is back up and running.
Hope this helps someone in the future.
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