I recently just set up a new computer build having issues of not turning on at times and turning off randomly when using it. I replaced the PSU and the turning off randomly issues stopped however it still had trouble where it would turn on when it wanted to. Also it would reset the bios when it did turn on. searching the internet I cam across a gigabyte cold boot issue which sounded exactly the same. I unplugged everything as to only use mobo, cpu and ram with same issues I thought must be cold boot issue and replaced the mobo to an asus one however once I plugged in all the stuff the dram_led is lit up red indicating a problem with the ram however the ram works ok in three other systems and the motherboard can support the ram and settings by default........
do you think it's the ram, cpu or possibly another defective mobo??