My PC is a custom build which has been running fine for at least 2 years now, until suddenly one day I went to turn it on and the PC was starting up but the monitor did not show anything.
If I unplug the monitor cable, the monitor complains it isn't plugged in. I have tried other monitors and saw the same result. Monitor ruled out.
The problem only happens randomly - sometimes it all works fine, and sometimes I have this issue for up to several hours.
One time I got a BSOD claiming an IRQL error, and then at reboot a "CPU not recognised" error.
And only just today the monitor just suddenly stopped working, but the PC didn't do a thing or make any sounds.
I am guessing it is a hardware issue, but I don't know how consistent it is and don't know if I can do the proper hardware troubleshooting myself.
I have read that it could possibly be a fauly graphics card, or motherboard. I ran a memtest86+ on my RAM for 7 passes and it was fine.
Any more tips??