It's dead Jim, PC help required, others may also opine.

[Beest]

Originally Posted by tw

Once the numbers are obtained, then the problem can be defined. Procedure was posted in Power supply problem? .

Originally Posted by tw

Measure a purple wire from PSU where it connects to the motherboard. It should read about 5 VDC. Report that number to three digits.

Measure the green and gray wires both before and when the power switch is pressed. Report those 3 digit numbers.

got my $5 Harbor freight meter.

I see the purple green and grey wires, but where do I put the other lead to the meter, ground ?

On the inside there is only one solid orange LED, at one corner of the motherboard, if there are other LEDs they are not lit.

Since this is the secondary/kids/backup computer I have time for diagnostics.