I have a ST3160021A that had a burned smooth chip. I replaced the PCB and drive is still unrecognizable. I did find a PCB with same FW and Site Code, but some chips are different. Do I need to replace these with chips from old PCB? If so, which ones?
Thanks!
Dr Dave

your problem will be the main amp control head
that goes inside the hard drive too

not worth doing unless you know how to do a head swap

Does the new smooth get hot?

Thank you, would you like to do it?
Dr Dave

Smooth does not get hot on the replacement PCB. It is fried and bubbled on the original...
Dr Dave

Try to swap an 8-pin ROM chip(25PVxxxx) from the bad PCB to the donor PCB.

Hi

a picture of the damaged and the replacement board would be helpful here...

pepe

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Adatmentés - Data recovery

On the new PCB what does the hdd do does it knock or does the motor spin or not .
Like PEPE said u if u take a snap of the PCB that is burned and the donor pcb as well it would be helpful .