Samsung 250GB SP2504C PCB Problems

[niceguy167]

I have a samsung 250GB Hard Drive With PCB Problems
It keeps blowing 1 of the eFuses I bought a like pcb and replaced the components that blew but they keep poping?
so my question is what would make the efuses blow and the other resistor as well.
I made notes on the photo.
Thank you so much for any help

Attachments

closeup of fried pcb

Shows what is fried on the pcb

[dmarques]

But what happens with the new fuzes? It spins and after blown them or doesn't spin them and blowns them?

It can be a few things, but I would tend to go for preamp.

[niceguy167]

Is there an easy test to do on the preamp to see if that is the cause?
Thanks again for your quick reply and i dont think it spinned it was like an instant blow.. like power was applied and it blew instantly
Also how expensive is it to have it recovered? if it is the preamp the preamp is on the heads and controlls which heads are used correct?
I bought a spare pcb to take parts from I would use this pcb to test the spinn up but do not want to damage the HDD any more.
The firmware on the board matches and everything else matches except it has a FS instead of a MS after the part numbers
thanks again

[dmarques]

Hi,

It's not so easy as that to test the preamp.
There are some measures you can make, but for that you need to have conditions to open up the drive.

How much will depend on the kind of damage, that no one can tell you exacly without diagnosing the drive properly.
Also depends on where you're located.

I think the best option if you want to avoid further damage is first to get a proper diagnosis from a DR company, and from that point on decide what to do.

[loki]

Could you not replace the component thats blown, remove the PCB from the HDA & then plug power in that way if its the PCB it will blow again if it doesnt then more likely preamp.

Just an idea

Loki

[fzabkar]

If the "fuses" (= zero-ohm resistors) are blowing, then there is a short circuit on the PCB or perhaps in the preamp.

The most likely culprit on the PCB is a shorted TVS diode.

See http://www.users.on.net/~fzabkar/HDD/TVS_diode_FAQ.html

A shorted preamp is easy to determine. First measure the resistance between ground and the +5V pins at the SATA power connector with the board removed from the drive. If there is a short, then check the 5V TVS diode. If there is no short, then install the PCB on the drive and perform the same measurement again. If a short now appears, then it will be due to the preamp.