Spare PCB for ST3200822AS 7200.7

[BadMac]

Hi, I have a drive which I cannot get going (its been in the shop for 2 weeks and the customer is getting tichy).
It is a 200GB SATA, original symptom, no spin up and one of the ferrite cores on the PCB was burnt out.
Model:ST3200822AS
P/N: 9W2854-301
HDA P/N: 100314751
Config: A5D-07
Firmware:3.01
Date Code:05072
PCB Code:100306335 F 7504B42M
Product of Singapore

I have swapped the burnt our component, no difference so probably something further downstream.

I have 2 spare similar drives:
Drive 1:
Model:ST3200822AS
P/N: 9W2854-301
HDA P/N: 100314751
Config: A5D-08
Firmware:3.01
Date Code:05185
PCB Code:100306335 F 7517DDM2
Product of Singapore

AND
Drive2
Model:ST3200822AS
P/N: 9W2854-301
HDA P/N: 100314751
Config: A5D-08
Firmware:3.01
Date Code:05272
PCB Code:100306335 F 352552TM
Product of China

When I swap the PCB the motor spins up and the head seeks, but then rests (drive spinning floating, just like the .11 ones do with SD15/BSY) in the middle of the platter so it appears to now be a not exact enough board match.

My questions?
In the Seagate config code what is the difference between A5D.07 and A5D.08?
Can I overcome this difference or do I need a more exact match (firmware swap, something else)?
Can anybody guide me towards fixing the board when I get some time, I am reasonable in terms of electronics?
If I need a more exact match anybody have one the want to sell/lend/rent/swap?

Thanks in Advance

[BadMac]

Cancel that. I have got it working (12V TVS was short circuit should have checked it first!)

All good. Tx.

[networkpc3000]

hi,
please send high qulaity images of your PCB both side to me by email. have you swap the original ROM to good PCB when you swap PCB?