HDD printed circuit board (PCB) replacement

Hello,
I have two seagate HD with
CPB numbers:
100468979 K 700557XD
and
100468979 J 7919M2WX

Can I use PCB from one to the other? will this bring risk to corrupt data?

A straight board usually won't work.

You will need to transfer the 8-pin serial flash memory chip from patient to donor. This chip stores unique, drive specific "adaptive" information. Some board suppliers include a firmware transfer or ROM transfer service for US$10 - $20.

http://www.onepcbsolution.com/seag [...] 20011.html
http://www.hdd-parts.com/firmware-transfer.html

Otherwise, if you are not adept at soldering, your local TV/AV repair shop should be able to do it for you.

The following article should help identify the components:
http://hddscan.com/doc/HDD_from_inside.html

Can you describe the failure symptom?

If you upload a detailed photo, one of us may be able to help you repair your board. Many times the problem is only a shorted diode, in which case it can simply be removed.

Otherwise, be aware that the 7200.11 models are affected by a BSY firmware bug. In such cases Seagate offers free data recovery. Alternatively, there is an easy DIY fix. The symptom is that the drive spins up but is not detected. Sometimes a drive will report 0 LBAs.

Just to be a wet blanket: In most cases, exchanging circuit boards will not fix the problem. Have you done enough diagnostics to determine that the problem is, indeed, with the circuit board?

(I seem to be the resident skeptic on this topic.)