P.S. could really use one of them exploding cats, to install in this computer , had lots of problems with it the last few days, it froze shortly after an error appeared and then refused to boot afterwards (not even a beep from the motherboard), it's done this twice now, I suspect a hardware problem.
It could easily be a windows update (if that's your OS). My laptop started behaving oddly after updating yesterday, the line detection doesn't work properly now and it keeps dropping in and out, with accompanying beep (until I got annoyed and turned the sound off).
Naturally I checked the output from the brick as I thought the high ambient t was making it shut down, but nope. Just windows being windows.
Bit behind on here again.....
It's done it again over the weekend, I'm fairly certain it's a hardware problem, as it refused to do anything other than spin fans/drives up and light the LED on the front. To rule out the OS (win 10) I unplugged the HDD's and still couldn't get anything for a while after repeatedly trying, I would normally expect the motherboard beep & show the boot screen, then the post info, would have thought an error about no drives too.
Not sure I can be bothered investigating further as the PC is getting on a bit, the motherboard & CPU are from 2008, I did replace the cheap nasty Coolermaster PSU after it failed in 2011 (filled with C
rapXon caps & not enough space to fit decent parts, due to component density). The GPU, RAM and HDD's got upgraded in 2014.
Might be time for a partial rebuild with new motherboard, CPU, RAM, SSD, etc. Thinking of going for a Ryzen 3700X (65W), not sure about the rest yet, as I need to see if I can find a motherboard with correct expansion slots for the GPU & other cards.
David