We received a Maxtor 4D040H2 in that would not spin up, no sound, and upon supplying power to the drive, a very hot spot could be found on the pcb. We ordered a donor pcb with the following specs:

Patient:
Model: 4D040H2
Code: DAH017K0
MfgDate: 05MAY2002
Full Model: 4D040H2220541
PCB Controller: 040106000
4 Letters:N,M,D,B
Location: Singapore

Donor:
Model: 4D040H2
Code: DAH017K0
MfgDate: 29JUN2002
Full Model: 4D040H2220541
PCB Controller: 040106000
4 Letters:N,M,C,B
Location: Singapore

After a PCB swap, the drive will spin up but you can hear the heads thrashing back and forth a couple of times before parking, no detection (obviously). AFIK pre-Seagate Maxtor drives do not need any adaptive chip swaps but the results seem to disagree. Is there any extra information I missed that I may have needed to match in finding a suitable PCB for this particular drive?

Of course it is possible that there was some internal damage in addition to the PCB problems, I am just trying to cover all of the bases.

Pictures of (P)atient and (D)onor drives are below:

http://i.imgur.com/NK8SZAt.jpg
http://i.imgur.com/bA6bGCY.jpg

Hello,

I think, that you need to match four characters.
patient N,M,D,B
donor N,M,C,B


http://www.donordrives.com/hard-drive-pcb-donor-match

According to that link you supplied you only need to match the 4 characters for a HSA or platter swap.

Only Code, Full Model, and Controller Version must be match (they do). Is this not the case?

If the head map inside is different, the PCB swap won't work.

Example:

Patient: 1,2,3
Donor: 0,1,3

If you swap the PCB, it will try to talk to heads that aren't there and not talk to heads that are. I did a test case where the first head is the only match, so the PCB allows the drive to detect and read the one head, but the other heads all get read errors. I think it was an older WD, but the same theory applies.

_________________
Luke
Recovery Force Data Recovery

Yes ,
Luke is Correct .Do You Have Any Firmware Tools Also For Maxto Even Salvation Works Like a charm BTW

_________________
Regards
Amarbir S Dhillon , Chandigarh Data Recovery Labs [India]
Logical,Semi Physical And Physical Data Recovery
Website-> http://www.chandigarhdatarecovery.com