Re: Unexpected system shutdown under load: bad caps or power supply issues?

Thanks for all of the replies. I made time to get out the multimeter and take some voltage measurements directly at the 20-pin motherboard power supply connector (with all system loads connected). I'm not an expert in interpreting these things, but it seems like the +12V was reading a bit high, and the +5V was reading a bit low. The +12V tended to creep higher during the memtest, and the +5V tended to creep lower, but I recorded the observed voltage reading when the system actually failed.

+5V...

Greetings! I'm the owner of an aging Asus A7N8X-E Deluxe system. Usually this system is left running 24/7, but some time ago I had turned it off for an extended period, and I encountered all sorts of stability issues trying to bring it back online afterwards.

Principally, this manifested itself with problems getting it to boot, and unexpected shutdowns when it eventually managed to boot. Eventually, when no amount of coaxing could cause it to power on again, I was convinced that the power supply had died (it was nearly to the MTBF spec anyway). I ordered and installed a new power...