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Computer does not turn on when Hard Drive is plugged into power supply

Last response: in Storage
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December 25, 2013 11:20:12 AM

Hi all,
Im building a new computer for christmas but i'm having an odd problem. If i turn the computer on with nothing but the motherboard, cpu, and ram installed it goes to POST, however if i plug in a SATA Hard drive into the power supply I cannot turn the computer on... the same thing happens when i plug in a graphics card. Any suggestions on how to fix this?

My specs:

Intel i7 3.5 ghz (with Thermaltake water 3.0 extreme cooling_
Cooler Master Silent Pro M 1000W
EVGA GeForce GTX 780
Asrock z77 Extreme 6
Corsair 16 gigs ram (2x8 sticks)
Crucial M500 2.5inch solid state drive(240 gb)
Seagate Barracuda 7200rpm 1TB hard rive (from old computer)

Thank you in advance!
a b ) Power supply
a c 304 G Storage
December 25, 2013 11:43:05 PM

Measure the resistance across the +5V and +12V supplies. Disconnect the AC power from the PSU just to be safe.

Do this with either the HDD or the graphics plugged in. If there is a short circuit on either device, then the PSU will give one kick of its fan and then shut down.

In the case of the drive, examine the PCB for a shorted TVS diode. Removing the diode should fix the drive. If you can provide a photo, then I may be able to identify the faulty component.

See http://www.users.on.net/~fzabkar/HDD/TVS_diode_FAQ.html
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