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I don't know why my pc won't turn on.

\015 I've verified the front panel plugs, I've tried 2 different PSUs, still nothing. I have power to the mobo, the green light is on, but nothing happens when I push the power button. I'm thinking that the power supplies didn't have enough amperage on the 12v rails to power it up after I added items. The original psu cranked up the pc, then I added a geforce 9200 pcie, a soundblaster live!, firewire ports on pci, a second DVDRW, and another 7200rpm IDE HDD. After I added these items, it wouldn't turn on so I upgraded from the oem psu to a thermaltake T2 430w with dual 12v rails and it still won't turn on. Any ideas? Thanks ahead of time for any help!\015\012\015\012\015\012 \015\012Apevia X-Gear Case silver\015\012\015\012\015\012\015\012Intel D915GEV (LGA775 Socket)\015\012\015\012\015\012 \015\012Intel Pentium 4 3.0GHz\015\012\015\012\015\012 \015\012e-GeForce 6200 (128-P2-N361-LX)\015\012\015\012\015\012 \015\012SoundBlaster Live! (CT4780) \015\012 \015\012\015\012 \015\012Seagate Baracuda 250GB IDE \015\012 \015\012WD Caviar Black 200GB IDE\015\012\015\012\015\012 \015\0122xSony DVD/RW IDE6x 80mm Case Fans\015

Answers :

Start by disconnecting and removing ALL of the new stuff. Try booting. You don't need to go into the OS, you are just looking for the mobo to act alive. In fact, disconnect the master HD. Add 1 device at a time and try to boot. The drives are probably NOT the problem. If you temporarily hook up the master as a slave, you won't have to worry about starting the OS but the load will be the same. I believe it is one of your cards. This will become evident when you 'plug and pray'.
Good luck!!!
Why not trying to unload mother board to bare minium to see if mother board still boots to bios,,if so add one thing at a time ,also check your 5 and 12 volts at one of the plugs to see if it is pulled down,,to a lower voltage,,I doubt you having a PSU problem
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