Replace ROM in Seagate

[alberto]

Hy, i need yours experience, I Have a Seagate ST320413A U5 Firmware 3.40 20 GB.. I need to recover data in it , but in the PCB have a circuitshort in a pin from the combo chip (spindle motor/heads actuator) I have found a Donnor PCB Very similar,
in CPU but not similar in NVRAM, my question is there any problem in this case? o does i need to replace from the bad the ROM And NVRAM and put on the Donnor PCB , then to the HDA

Thanks for all help

[Valera]

Replace the combo chip ( SH6950C ) from the donor on your PCB.

[pepe]

Hi,

If the Flashes are 49F1024 and M29F102BB, they are completely interchangeable. I saw theese two on seagates.

pepe

[alberto]

now i replace the ROM From the Bad PCB and put in the New PCB but the hard disk its not initializing in S.A ,
Any idea

[pepe]

Hi,

Does it spin up and move it's head?
What type of flashes were on the boards?
-

pepe

[cuke]

you have a try
replace the bad rom to the normal pcb.