I've been trying to repair a Fujitsu Siemens Amilo Li 1705, which was overheating at the socket where the power cable goes in.
To get to the socket involved quite a bit of "unplugging" - but I got there and removed it, then soldered in a new one.
This works perfectly and the motherboard still has power.
I plugged all the wires back in, switched it on and got BIOS beeps and the hard drive sprung into life.
But, after a minute or so, it switched itself off - and now it won't switch back on.
Is there anything I can do?