System was running fine, took a power hit and now it won't boot. On POST, I get a long and 2 short beeps which I understand is a problem with the graphics card.
The old XFX HD-4850 graphics had 2 red LEDs (D1601-overtemp protection enabled, D1602-EXT 12V fault) The fans all run and everything looks/sounds normal on power on, but the graphics LEDs come on immediately and I get the beep code for the graphics card fault. Nothing on the monitor.
I tried an external power supply (Antec 430w) but did not see any change. Will the external supply put out normal voltage if it doesn't sense a motherboard? No guarantee the Antec power supply is good, just trying to see if my installed OCZ might not be damaged.
Wanted a new graphics card anyway, so I put in a new PNY Geforce GTX 960, but no change.
Any ideas on how to identify the failed component without a spare test system?
Gigabyte GA-MA770T-UD3P motherboard, OCZ 500w powersupply
Thanks in advance for any help you can provide.