|Hi, and thanks for answering.|
Whether the system is cool or not seems to make no difference, as it has worked and failed both warmed/cooled. I have tried re-seating power connectors, both on PSU and on motherboard, the system still won´t power up.
As for beeps, I have been unable to power up the system again today, I haven´t really noticed if it beeps when it works, but it definetely does not beep when it fails. The motherboard output displays the boot sequence went fine, does that mean anything, or the mb may be not operational even though the output says otherwise?
About PSU, I will try to get another one to test later, but shouldn´t disabling hard disks and other stuff help in that case? Or shouldn´t it fail after some time of computer use, if it were faulty? I have tried disabling every non-essential stuff and the monitor still does not get signal.