So my pc went to sleep earlier and may have slipped into a coma, now I'm not getting any power to the system. I swapped a new psu in last weekend, so j figured that may have been the culprit. I unplugged the 24 pin and cpu cable and plugged my old psu into with no change. Checked the fuse and the outlet I'm using and they're both fine.
Any suggestions?
The LED for the power button on the mobo isn't lighting up, which should be on when it is off but powered.
It's running windows 10, which does occasionally give me an issue when waking up (mainly my monitor not displaying) but nothing like this before
With a voltmeter you should be able to see some power on the board in all sleep stages, question is where. A stupid thing which sometimes breaks is the power button, so try shorting those two pins.
I don't have a voltmeter unfortunately. I've tried the case power button initially and the built in power button on the mobo. Neither have worked. And the built in one should be lit even if it's powered off. As long as it's receiving power.
Are there any LEDs or 7-segments on the board which suggest basic power?
You could try a CMOS reset, some BIOSes don't do well with certain sleep states used by some OS versions.