Hi there.
I have an ageing Poweredge 1300 I now use as a Linux box for development and experimentation etc.
It has functioned admirably for the past 16 - ish years but now is demonstrating this problem.
When a power cable is inserted into the power supply, the supply fan immediately starts but the system fails to boot. The disks startup but there seems to be no power to the motherboard. Nothing is output to the monitor. The main power switch is ineffective. One time pressing the soft restart caused the unit to go into POST but this then hung during memory test.
Anyone any ideas? My first pass is to try another power unit to isolate the problem, but I am constrained by availability, I wonder what a "paperclip" test of the power unit would reveal.
Any help much appreciated
Martin Langley