gday all,
PC: Asus P5QL Pro - Sapphire Radeon HD 4850 - 500W Silverstone PSU, only 2 years old, had all been working fine until...
DVI output was a blank screen when i tried to wake up PC from standby the other day.
Turned it off, then back on and same result (not "no signal" just blank screen)
Wouldn't even post, let alone BIOS, everything else looked like it was starting up ok (fans leds etc) except for no graphics card fan, red LED briefly lighting up on graph card as well. The PC wasn't actually starting windows etc in the background.
Started PC without 6pin extra power supply plug for graph card and same result, but then plugged in power supply and immediate full fan action on said card. Re-seated graph card to no avail.
Did some screen swapping, VGA/DVI swapping and finally part swapping (RAM, graphics) and turns out the PC works fine with a friends old ATi 1300 graphics card. Only difference is this card doesn't need the extra 6pin power supply.
That seems to be the only variable left PSU 6pin plug failure or dead Radeon 4850?
Tested 6pin PSU plug for voltage and perfect 12V readings all round. But that doesn't mean it supplying the right wattage to start up the card... does it?
Don't know anyone else with a PCIe extra-powerplugged graph card or sufficient power supply. Tried graph card in a friends 350W Dell that had a quad core processor - no luck but not expecting any!
Any suggestions? Thanks!
p.s. i'm thinking about baking the card but not desperate enough ... yet


