WD drive with new pcb board and still doesnt work

[merchy1973]

So I have a WD1600bb drive that came in an external caddy. One day I plugged in the wrong power supply and it stopped working. I checked the PCB board and it looked like the 12v diode popped and was charred. So I bought another PCB from what looked like exactly the same drive, and on the pCB it has exactly the same board number etched in - 2060-1292-002-rev a. So both the same. When I boot it up and add power with the new pcb - the drive makes a normal sound, no clicking, the drive installs, but the computer can never see it...It sees a usb drive only or generic 'disk drive.'

One thing I have noticed on the drive is that the bios chip is by different manufacturers. Is this why my drive cant be seen?
Any help gratefully received! Got about to the end of my IT knowhow!

[merchy1973]

thanks for replying so quickly. I have zero soldering skills, are there any easy ways to transfer the content of the rom, or indeed buy another pcb board with the correct rom?

[dick]

Hi, you have a couple of possibilities here.
Maybe that.......

12v diode popped and was charred

was in fact a tvs protection device. When removed and or replaced there is a chance the pcb will work again so no rom swap required.
Or if the pcb is really burnt out then the rom can be swapped from the original pcb to the donor. In your case this is best done by somebody with good soldering skills and equipment.

Where exactly are you located?

[merchy1973]

Actually yes you may be right - I've attached a pic. Is that a burnt out TVS diode? I'm based in Northampton UK.

[pcimage]

You have PM.

You can either risk removing the TVS, or take me up on the offer therein

[dick]

Yes it is a 12v tvs.
It has to be carefully removed. Then it is best replaced but the drive would still work with it removed providing the other components are still intact.
Northhampton is too far for me. Sorry!

I see pcimage has popped in. If you get it to him he could do it for you with his eyes shut.

[fzabkar]

Actually yes you may be right - I've attached a pic. Is that a burnt out TVS diode? I'm based in Northampton UK.

C360_2014-04-18-18-33-58-722.jpg

If the "000" resistor the right of the diode measures 0.0 ohms, then simply remove the 12V diode and you should be good to go.