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Overvolted Kingston A400 480GB SSD
http://forum.hddguru.com/viewtopic.php?f=10&t=40784		 Page 1 of 1
Author:  AlfredoHAC [ January 3rd, 2021, 16:54 ]
Post subject:  Overvolted Kingston A400 480GB SSD
Greetings from Brazil!
First of all, happy new year to everyone!

A while ago I bought a new PSU (an EVGA one) to replace the one I had (a Corsair one), it turns out that the cables of one are not compatible with the other
occurring a voltage change in the SATA Power cable.

This voltage change overvolted two HDDs and one SSD installed on my PC, the HDs I was able to repair, replacing the TVS diodes and the zero ohm resistors, but the SSD I couldn't fix yet.

Measuring with my multimeter I found that some voltages are missing on the SSD board, preventing it's normal work, like on those marked capacitors that only have 50mV on each one.

I'm starting to think that IC near the capcitors is either shorted or dead, I don't know for sure.

Can you guys help me? This SSD contains some ULTRA important files of my job and I need they until the end of the week.

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Author:  fzabkar [ January 3rd, 2021, 17:14 ]
Post subject:  Re: Overvolted Kingston A400 480GB SSD
I can't see the part number, but the 10-pin IC looks like an e-fuse.

There appears to be a 5V TVS diode nearer to the SATA power connector. There should be 5V on that.

The e-fuse should have 5V on Vin and Vout. Check that Vin and Vout are not shorted to ground.

PCB protection devices - Electronic Fuse:
http://www.hddoracle.com/viewtopic.php?f=100&t=1615&p=16092#p8872

If the e-fuse is open circuit, and if there is no other damage, you can bridge Vin to Vout with a shorting link. In fact I think you will find that the two pads above the TVS diode are reserved for a standard fuse. If so, then you can snip the pins off the e-fuse and solder a standard fuse (or wire link) between those two pads.

I can't see the circuit clearly, so you will need to decide whether this is correct.

Personally, I would confirm that there is no short to ground at any of the inductors. If these are shorted, then the main ICs could be dead.
Author:  AlfredoHAC [ January 3rd, 2021, 17:21 ]
Post subject:  Re: Overvolted Kingston A400 480GB SSD
Forgot to say, I've already replaced the 5V TVS Diode.

The old one was completely open.
Author:  AlfredoHAC [ January 3rd, 2021, 22:10 ]
Post subject:  Re: Overvolted Kingston A400 480GB SSD
I don't know how to thank you fzabkar!

Quote:
If the e-fuse is open circuit, and if there is no other damage, you can bridge Vin to Vout with a shorting link. In fact I think you will find that the two pads above the TVS diode are reserved for a standard fuse. If so, then you can snip the pins off the e-fuse and solder a standard fuse (or wire link) between those two pads.


I shorted the "standard fuse" pads above the TVS Diode, and the SSD finally worked, now I'm making backup of my files.
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