I have a PowerEdge T105 that is only lightly used but has been switched on almost continuously for 4½ years. Yesterday it suddenly powered off and won't turn back on again. There are no lights on the front or back. The only light is an amber LED on the motherboard close to the power supply unit which is continuously dimly lit (not flashing). Am I correct in thinking it's a faulty power supply unit, or could it be much worse such as a BIOS/motherboard failure? If it's the PSU, can I buy any generic PSU to replace it, or do I need to buy something specific to this range or model?
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