barracuda 7200.7 PCB repair

[drdaveradio]

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

[craig6928]

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

[rchadwick]

Does the new smooth get hot?

[drdaveradio]

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

[drdaveradio]

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

[Starling]

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

[pepe]

Hi

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

pepe

[rameez]

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 .