If ur preamp didnt bite the dust - there is still chance.

Even if it did...

When I receive the PCB tomorrow and install it on to the HD if it spins and seen by my computer then that would be a lucky escape.

If I install it tomorrow and nothing spins then I know I have blown the pre amp and possibly my chances of recovering the data.

Due to the costs of pre-amp recovery by DATA RECOVERY firms then I would have to put it down to experience and give it a miss.

What will be will be...

I would first ask your repairer to confirm the presence of the onboard voltages at Q1 (linear regulator) and at the switchmode DC-DC converters near the SMOOTH chip. Also get him to test for the presence of the +5V and -5V supplies at the preamp pads. If these are OK, then I would have more confidence in a good outcome.

BTW, I mentioned Diverse Devices because the proprietor is a regular contributor at the sci.electronics.repair newsgroup which I watch on a regular basis.

_________________
A backup a day keeps DR away.

I thought I would post an update...
I got the drive today installed the PCB and plugged in the power but alas though it powers up.
I do not hear the drive working so like I said in my previous post it's the end of the road for me...

Put it down to experience and walk away...

you do not hear drive working ? As in no spin or heads not moving ?

Assuming that the head preamp is still working and the damage is limited to the PCB, the odds are high that a professional data recovery firm could still recover your data without it costing an arm and a leg. But, you have to be up front about what was done and perhaps ease the tension by offering to cover the cost of the donor drive, is such a purchase is needed.

_________________
Luke
Recovery Force Data Recovery

Dear Sir.

I also went to same experience as you , i plugged my laptop power cord 19v and the 750 Westerndigital is not working .

I am going to do same thing as you try to find out if the diode is burnt and then replace.


Thank you for the information.


Regards.

Vinay Navinchandra

Dear Sir.

Yesterday i did same mistake putting power cord of my laptop 19v and western figital is not working any more.

I will do same as you try to find out the broked diode and replace, onle chance.



Regards.
Vinay

hi, i got 1tb wd cavier green ears....its not detected by my comp...so when check in internet..maybe fault of board..so i took out d4 diode....but what happen is...hardisk start to give clicking noise.....still no detected by comp..any suggestion

Probable bad heads o FW problem or media problems. but not sure

con you show us picd from your drive, stiker and pcb from both sides.?