SanDisk Ultra 2 Controller problem?

[Ihab]

Hello guys!

I have a SanDisk Ultra 2. At first iit was possible to get it ready via short on PC3K but after some minutes it stoped.
I lloked via termal cam and saw that the controller is getting some temperature... like 38C.. not so special.

But i dont know whats the problem... could anyone help me or give me some advice?

Thank you!

Greetings,
Ihab.

Attachments

[Lardman]

If it used to come ready and after a delay and now doesn't it would point towards firmware problems from degraded nand. Supported in pc3K ssd.

[Ihab]

Lardman, hello, sadly it doesnt come ready... even after short..

[Lardman]

Is it going into safe mode?

[Ihab]

Lardman, not anymore.

[Lardman]

If you're not getting anything from the controller check the power rails to ensure it is being powered correctly. I don't have a pcb to check for you I've looked. Also check the power consumption pattern and usage. I've not seen a dead controller on these - perhaps others have?

[Ihab]

Lardman, okey, i will check it. Thank you very much.

[fzabkar]

What are the voltages at L1, L2, L3, L4?

[Ihab]

fzabkar, Hello,

L1 seams to get nothing
L2 also seams to get nothing
L3 around 1.8
L4 around 0.7

but not 100% sure on L1 and L2 to be honest...

[fzabkar]

It would be unusual to have two step-down converters fail at the same time. Are you measuring the voltage between the inductor and ground?

[Ihab]

fzabkar, I was measuring on each side from the inductors.
Do you think it would be worth to change them?

[Lardman]

Work the rail backwards until you find some voltage, the inductors don't produce it.

[Ihab]

Lardman, fzabkar, I don't know why, but the SSD ist not taking anything now....
Not sure what i can do to be honest...

[Lardman]

Lardman, fzabkar, I don't know why, but the SSD ist not taking anything now....
Not sure what i can do to be honest...

Start at the 5v input at the sata connector and work forwards then - this is basic troubleshooting and certainly not something your should be learning to do on a clients drive. Buy/get an identical donor drive and work with it until you understand how power is delivered to the major ICs.

[Ihab]

Lardman, Thats a good Advise! Thank you, i will do it like that.

And i was just checking it, didnt worked on it jet.

[Ihab]

Lardman, Ihab, It was a problem with the PC3K... SSD has still the same problem