[SOLVED] Blown fuse on hard drive PCB

[mhspyder97]

Through searching I have found some parts of my question but I have 4 hard drives that got taken out by a dying power supply. Two of them were the WD rebranded HGST Helium drives that have a simple single fuse on the 5V line to bridge. They are copying to new drives right now.

I have 2 others that are Seagate ST5000DM000 drives and seem to have a parallel fuses on each inline voltage. I bridged one fuse and left other open but now Windows gives me a warning when plugging the PCB into my external that the device is trying to pull too much power for the USB. I am guessing I should try and bridge the other fuse as well?

Also any advice on replacement fuses for both PCB's. Not really sure one amperage or anything for this ?

First 3 pictures are of the Seagate PCB:
https://i.ibb.co/HxMKLqS/1.jpg

https://i.ibb.co/SXsCg7r/2.jpg

https://i.ibb.co/T1BXJyJ/3.jpg

Last is of the WD PCB that I need a single fuse replacement for:
https://i.ibb.co/vsdScmJ/4.jpg

 

[Ralston18]

My thought is do not bother.

Who knows what other damage may have occurred to the PCBs and trying to reuse them (with or without bridging or replacing the fuses) may happen next.

And even if currently undamaged any repairs may cause damage.

Just install new drives and recover your data from backups.

 

[fzabkar]

The Seagate PCB has a 5V TVS diode that is probably shorted. If your PSU can be trusted, just remove the diode with flush cutters. The drive will work without the diode, but it will no longer be protected from overvoltages. The diode is the horizontal component below SATA power pins 1, 2 and 3.

https://s.yimg.com/aah/yhst-14437584971410/918062912-1.gif

See TVS Diode FAQ:

http://www.hddoracle.com/viewtopic.php?f=100&t=86

You can use SMAJ5.0A (5V) and SMBJ12A (12V) as replacements for the diodes.

Here are some fuses. Use 4A for 12V and 2A for 5V. Confirm the dimensions before ordering.

Littelfuse Surface Mount Fuses, N = 2A, S = 4A:
http://www.farnell.com/datasheets/48294.pdf