For a long while I've had trouble powering this machine on - I would have to try pressing the power switch several times, or trying different button press durations, before it would actually power up.
Recently there's been a power outage in my neighborhood (while I was away). The power overall is back, and it doesn't look like anything in my apartment burnt out, but - I can't get the PC to power up.
Findings I've made:
- I've checked my power supply by shortening pins 15 and 16 of the 24-pin connector: The fan is turning and the voltages seem ok when checking with a multi-meter (I only tested a few, not all 24).
- When I check the resistance I through the case's power switch (via the headers at the end of the blue-white twisted pair) - it's typically infinite, drops to 0 when pressed and climbs quickly to infinity after a depress.
- I tried using the motherboard's on-board power switch - no effect.
- I tried using the JCMOS jumper to shorten the two pins usually taken up by the power switch connector - no effect.
- I don't remember whether the motherboard typically has a light which remains on while power is "off" but the power chord is connected. I think it doesn't (meaning that's not an indication of the board's state).
- I don't see any capacitors which seem to have blown out. However, the capacitors are covered, and the cross mark I remember from earlier motherboards I owned, where they pop out / blow out does not seem to be exposed. See this image of the board for an illustration of what I mean.
- No physical damage is apparent anywhere on the board or the PSU.
I suspect the problem is with my motherboard. Is that necessarily the case? If it is, what can I do other than replace it altogether?