A client plugged a 16.5v supply into their external.

I have a good donor board and completed a ROM transplant but the drive clicks, powers down, powers up, clicks, powers down......

Looking at the foam backing i can see that the component circled in the attached picture has been damaged (the same area on the foam is burned). Does anyone know what this component is please? Can it be removed/swapped from a donor board?

NB This is the clients board with the ROM removed. If i can repair this board i will put the ROM back natch.



Thanks

Sounds like pre amp is damaged.

i was thinking that as well.

Clients board with clients rom - drive doesnt power.

Donor board with donor rom - drive clicks constant 'tick tick tick tick'

donor board with client rom - drive clicks, power cycle, clicks, power cycle.

because the heads acted differently each time i was hoping it was PCB incompatibility rather than heads. but then with all WD drives in the past, a ROM swap has allowed me to access data.

I may as well swap that component over anyway and see what happens, unless anyone tells me not to in the next few minutes in case i cause a rip in space time or something.

i can't see it doing harm but its a waste of time.

test pre amp.

Almost certainly preamp/heads.

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yep. time wasted will look at heads. thanks all.

Over that models, when the HDD has PCB problem when u put donnor PCB the HDD reach readiness, but passport should show the "alias code" from factory " Mammoth , XYZ...etc" and u got ABRT register all the time, if its knocking surely are MHA problems