New PSU, old SATA HDD not found

November 10, 2011 at 23:28:41
Specs: Windows 7

As the title says, I just got a higher rated PSU in order to run a better graphics card. Despite working fine before, the HDD connected to the sata cable will now boot, and is not found in the BIOS. I have reset the cmos, bios factory settings etc to try to find it but to no avail. All voltages in the BIOS are great, and I can boot from the (not sata) cd rom drive fine, so the PSU seems to be working well. I figure the make of the mobo isn't important for this since I know it works fine with the HDD, but the HDD is a Western Digital caviar black (WD5001AALS).

I figure it isn't getting power since it doesn't spin up at all.
Edit: the red light comes on when i power on the pc and stays on. Unfortunately the case for my pc is really old and the beeper doesn't work, so I cant' tell if it is beeping.

Considering it is plugged in in exactly the same way the old PSU was (they are literally exactly the same model, Vantec ION 2) but the new one is 620W instead of 480, I dont think that there is any problem with the connectors... although the HDD is strange in that it has two different types of power connectors.

Exactly how should I proceed to work out what the problem is?

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November 11, 2011 at 05:23:23
Your new power supply should have a spare SATA power connector, try that one in case one is bad (if so, return it for a new one). Try switching the signal cable or at least unplugging it, examining it, and replugging it in since you may have disturbed or damaged it during the swap out process.
You also may have overlooked grounding yourself when you opened the case, so you may have damaged the hard drive, memory or other component with a static discharge. Try the hard drive in another computer as a second hard drive to see if it works.

You have to be a little bit crazy to keep you from going insane.

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