Seagate 7200.11 not responding

[Saber_Master]

Hi,
I have a Seagate500GB Freeagent 3.5" ext HDD and i accidently killed my HDD by plugging in 20V notebook adapter(12V org.). I removed the case and took out the usb adapter in it and now i have a 500GB 7200.11 ST3500820AS int. HDD in my hand. I guess the problem is the PCB or any electronic part on it. When i plug the drive into my PC via sata cable my PC stops responding, doesn't open and even the power led doesn't work. All dead..When i took it of everything goes back to normal. So please help with this situation. I decided to swap PCB but i read that its useless(is it?). And if i swap PCB with a working one do i loose data on my HDD.
One more question;
if PCB swap work which Seagate models use the same or compatible PCB with my HDD

Thnx

[viktdev]

First, you should check the tvs. Search the threads for tvs , you'll find some explanations.

[Saber_Master]

it seems i'll check and remove the tvs if it is faulty but before i have a question.
When i plug it into my pc via sata slot on my asus MB and when i turn the pc on nothing happens. No lights, no sound, no electricity..nothing. All dead. When i remove the HDD everything turns OK. Is this normal.

And thnx for the advice...

1 more thing...Can i replace the tvs on my HDD with any tvs removed from any seagate HDD...maybe my old 200GB SATA?

[hddmania]

Sounds like at least the TVS problem... As long as it has the same capacity, then you can use the old TVS from other seagate drive. Good Luck!!!

[Saber_Master]

Changed the faulty tvs and everything is fine. My HDD is back. Thanks for your help and saving my money