PC Won't Boot

mfc9x

Distinguished
Nov 14, 2010
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18,510
I just re-assembled my PC in order to replace the heatsink, but now the computer won't turn on. My motherboard (P5N32-E SLI Plus) has a green flashing LED when the power cable is plugged in, and the power switch on the PSU (Sweex PS040) lights up, but the power switch does nothing. I have searched the internet and mobo manual, but I can't find a decisive answer to what the flashing LED on my mobo means. Help would be greatly appreciated :).
 
I took the graphics card in and out, as well as unplugged and replugged several power cables, and tried different configurations with and without RAM, but the problem still persists. Any other advice 🙁?