Hi!
I got two disks. Damaged disk, Maxtor 6Y060L0421001 has the D6FYA PCB and the good one has E4FYA PCB. Can I replace them with no problems, or maybe they are incompatibile?

Hello,

If you are sure, the D6FYA is damaged, you need to measure the preamp first, before try the other pcb.
The pcb is phisically compatible, and maybe works with the bad drive.
If the rom content is uncompatible, nothing happens, only clicks. (safe for some minute)
But if you preamp is short, the new pcb will be fried as well....

Regards,
Janos

The disk starts up and clicks and Bios cannot see the drive. The first thing I want to check is the PCB. But maybe it is useless, what do You think bout this?

Usual.

I always starts with the clicking drive the following:

1. measure the preamp
2. check for damage in cleanroom
_AFTER_ 1+2
3. try to start.

Regards,
Janos

How?