I'm completely new to data recovery. I have a WD1600JS-00MHBO hard drive that I foolishly connected both SATA power and Legacy power to. Now it will not read in Bios. Bios kind of sees it but not correctly, only 8gb. Windows will not run if I have this connected. I cannot afford the thousands of dollars our local data recovery clean room wants to charge so I'm trying this on my own. I'm hoping I can just replace the PCB and recover the data.

First the specs.

MDL: WD1600JS-00MHB0
Date: 27 Apr 2005
DCM: HSBHNTJAH
PCB: 2060-701335-003 REV A

If anyone has this board I'm interested in purchasing it.

I've found a similar drive on ebay and at a local recycle shop with PCB: 2060-701335-005 REV A. Is there a chance this is compatible?

Also what other problems could be caused by connecting both power connectors?

I'm not 100% positive that this caused the problem the system died and when I was trying to recover it by replacing a power supply, I made the mistake. The new power supply did not fix the system and I think the motherboard is toast. It is possible that the power supply went out and caused problems along the way.

The PCB off my drive looks fine. No burnt chips to the eye.

I also found one that is 2060-701335-003 REV B. Better, worse or equally no good?

Have you tried powering the drive from each power connector in turn?
Also bear in mind, that I have read how others have ended up with a bad ps after falling into this trap.

From what I've measured, the 5v and 12v rails of these two connectors are in parallel with each other, so it may have only cooked the copper track[s] on one or the other.
I assume this can happen because the sata power is derived from a different ps regulator to the legacy connectors and any voltage difference can cause significant current to flow from one to the other.

This being the case, then you could also try buying a sata to legacy power adapter and apply power to both hdd connectors again from the one legacy feed coming from the ps.

Well that's exactly what I did. The original set-up that has been in service for the past 4.5 years did not have sata power from the ps so I used a 4-pin to sata converter and connected it to the sata power on the drive. So when I had everything apart and noticed that the 4-pin was not plugged into the drive I connected it, thus powering both sides. I tried both together, just sata and just legacy and nothing works. The drive spins and makes a terrible noise kind of like something is not lined up properly. It repeats the noise a few times then stops.

Hmmm.... these pcb's are probably 4 layer and it may be that an inter-layer link has been cooked, leaving some part of the pcb isolated from power or earth.
Either way, it seems your going to have to get the best match pcb possible and try swapping it.
If the drive at least spins up without any rude noises, then you'll know your on the right "track"

Ok you said best match. Would that be 2060-701335-003 REV B or 2060-701335-005 REV A to match my 2060-701335-003 REV A, or does anyone have the right one I can buy?

I'll leave others more expert than me to field the question of compatibility.

Try to match as close as possible!!! I know it may work but I wouldn't go with a different revision...