You should have just your MoBo, CPU, HSF, PSU and a power switch connected right now. Unplug all the cables (including SATA, IDE, FDD, SAS, USB, Firewire, HD Audio, and all the switches but the power switch) from the motherboard. Disconnect EVERYTHING else from power (hard drives, DVD drives, etc).Ĥ) Remove all RAM. If you don't have the PSU tester, swap in your known-good PSU.ģ) With the PSU verified to be good, plug in ONLY the power to the motherboard (20+4-pin and 4/8-pin CPU power, but NOT the 4-pin molex connection if it has one).
Keep an eye on the "PG" and see if it ever reports 0ms or 999ms as this means it's a bad PSU (since this is unloaded it won't fail the PSU tester every time even though it will fail the motherboard every time). Unplug and re-plug the 24-pin connection several times. If you smell burnt electronics, keep that in mind if you hit step (7b) below as that'll mean its the motherboard 99.9% of the time.Ģ) Test the PSU with a tester, if it's not beeping/blinking at you then it's ok. Specifically around the VREG (left/above the socket), Southbridge (below the socket) and Chipset (right of the PCI slots) areas. The dreaded "FF" POST code, or no POST at all (this fix is best done outside a case to ensure the case isn't shorting the motherboard):ġ) If you know what burnt electronics smell like, then smell your motherboard.
An article I saved and can assist others in the future.
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