The bloody thing has now just booted up after trying for ages.
I tried something new. I did the usual attempt to turn it on - as usual it failed to boot but, as the mobo, gets power, I pressed the power button that is located inside the case (there are 3 of them that are illuminated Power, Reset and ClrCMOS). Bloody thing whirled into life.
Still, there is definetly a problem here - but at least I found a possible work-around.
I'm going to turn it off again and see if this new 'trick' works again.
I tried something new. I did the usual attempt to turn it on - as usual it failed to boot but, as the mobo, gets power, I pressed the power button that is located inside the case (there are 3 of them that are illuminated Power, Reset and ClrCMOS). Bloody thing whirled into life.
Still, there is definetly a problem here - but at least I found a possible work-around.
I'm going to turn it off again and see if this new 'trick' works again.