I have a desktop that has boot problems that can only be from an hardware component.
The desktop will shutdown at apparently random moments, it can be immediatly before the screen even turns on, it can be anywhere during the BIOS/OS boot process or even when the OS is running and fully operational.
It might just be me, but it seems that on the occasions where the system is able to fully boot into to the OS, the chance of turning off automatically is reduced since it is able to stay on for hours/days.
The power off behaviour seems to be pretty random, and keeping the system off with the power cable removed for several hours to discharge does not seem to help much. If I insist on turning on the system, in the same minute it can turn off 3 times immediatly, 2 after a few seconds, and finally fully boot into to the OS.
I suspect this behaviour might be from a problem with the PSU, CPU, Mobo or RAM but I would really love to avoid the diagnosis by trial removal and substitution of components since I don't have similar spares. Is anyone able to assess with some certainty what component could be causing this behaviour?