HDD GURU FORUMS • View topic - Samsung 970 Evo Plus 500GB no power

Page 1 of 1

Samsung 970 Evo Plus 500GB no power

Posted: March 15th, 2026, 12:29

by gameboybin

I got this 970 Evo plus Samsung NVME SSD

: Screenshot 2026-03-15 232347.png (60.59 KiB) Viewed 726 times

I have measured some capacitors. None of them gives any voltages
Upon Heat inspection the only chip that have a slight temperature is this AtAYF chip

: IRI_20260316_020146.jpg (252.8 KiB) Viewed 726 times

: VIS_20260316_020146.jpg (68.73 KiB) Viewed 726 times

The drive consuming 0.1A

Thanks for helping me out!

Re: Samsung 970 Evo Plus 500GB no power

Posted: March 15th, 2026, 14:08

by fzabkar

"AtAYF" is an e-fuse. There should be 3.3V at Vin and Vout.

https://www.hddoracle.com/viewtopic.php?p=8872#p8872

I expect that its pinout would be similar to STEF05:

https://www.hddoracle.com/download/file.php?id=3096&mode=view

Re: Samsung 970 Evo Plus 500GB no power

Posted: March 15th, 2026, 15:59

by fzabkar

fzabkar wrote:I expect that its pinout would be similar to STEF05:

Perhaps it's similar to STEF4S rather than STEF05.

Re: Samsung 970 Evo Plus 500GB no power

Posted: March 21st, 2026, 7:13

by gameboybin

So i managed to fix the drive. The problem was the Power IC S2FPS05A01. After swapping the chip. The drive started working again