glowstar

Update, I have a motherboard tester now. I stuck it in and it gave the code A1, which according to the booklet means "Check key lock", and as I mentioned its a Acer Aspire T650 with a Pentium D 820, 1GB DDR2 and a PCI-E gfx card, there are no key locks or case locks etc in sight. I have no idea where to go from here, I have no idea where the "key lock" is and how to check it... any advice appreciated.

Not dumb question, I didn't state if it worked or not. But yes, it does work with other PC's I have, so it's not the monitor that's not working though I wish it was :/

Yea, tried them all out of the case on a desk, only the one that came with the case has been in the case. Going to borrow a motherboard tester that you stick in a PCI slot soon, so maybe that will yield some further results.

As I mentioned, I've tried three motherboards... Sparda, all that was connected was the power switch. Mr-Protocol, Only one of the three motherboards has on-board and I tried that too (with and without the PCI-E card connected). iisjman07, I have tried all that on all three motherboards.

I bought a pc for £10 as it didn't work, all I really wanted was the case, but when I got it I saw it was a Acer Aspire T650 with a Pentium D 820, 1GB DDR2 and a PCI-E gfx card so I thought it may be worth getting running to use as a HTPC. The problem: When I pressed the power button the PSU and CPU fans spin up, but nothing comes on screen, no beeps. What I've tried so far: Tried both VGA and DVI on the PCI-E gfx card, and the on-board VGA. Tested PCI-E gfx card in another machine, works fine. Tried with and without hard drive connected. PSU tested and works fine, tried another PSU too. Took RAM out to see if speaker works, powered up and it beeped continuously until powered off. Tested RAM in another PC, works fine. Reset CMOS on motherboard. Tried the CPU in two other socket LGA 775 motherboards. Tried a Celeron D CPU in the three different motherboards. Through all that, the only thing that would happen is the PSU and CPU fans spin up, but nothing comes on screen, I'm out of ideas as to what could be wrong. I would really like to get this box working, seems a shame to let it go.