Microsoft Surface 1911 - m.2 - SK Hynix Cepheus

[Spotmen]

Hello,

Has anyone work on those Surface m.2 before ? I am looking for test point/safe mode. I've checked all resistor and coil, nothing bad. There's on short but I beleive it's fuse.

Thanks
Spot

Attachments

sata_reg.PNG (2.77 KiB) Viewed 17285 times

[fzabkar]

You may be able to provoke safe mode by disabling the 2.5V supply. You could do this by grounding the Enable pin, assuming it is connected to a pullup resistor.

https://www.ti.com/lit/ds/symlink/tlv62085.pdf

[Spotmen]

Thank you. I've tried to GND before the pull up, no luck.

Attachments

[Spotmen]

ok, I desoldered the chip and could read it.

[labtech]

ok, I desoldered the chip and could read it.

Does it have any encryption when reading the chip directly?

I received one the other day and the customer was paranoid about us making any kind of physical modifications. So, we gave it back to him.

[Agrail]

It is a PCI-E drive, but you are trying to read it over SATA.

[fzabkar]

It is a PCI-E drive, but you are trying to read it over SATA.

Doh, you're right. It should have been obvious from the photo, but here is added confirmation:

https://www.techpowerup.com/review/sk-hynix-gold-p31-1-tb/

The controller is an in-house design by Hynix called "ACNT038," or "Cepheus."

Interface: PCIe Gen 3 x4, NVMe 1.3

[Spotmen]

ok, I desoldered the chip and could read it.

Does it have any encryption when reading the chip directly?

I received one the other day and the customer was paranoid about us making any kind of physical modifications. So, we gave it back to him.

No, you see NTFS with Bitlocker.

[labtech]

Thanks for the response.

[Paradog84]

ok, I desoldered the chip and could read it.

How do you mean? Desoldered onto another adaptor, or do you have a test socket?

[suricate.ch]

I got one of those.

https://www.dolphindatalab.com/product/ ... ter-smart/

[Paradog84]

I got one of those.

https://www.dolphindatalab.com/product/ ... ter-smart/

Thank you for the info! I have been searching for a test socket for these BGA 1620 chips.

Up until now I have been using a Samsung PM971 PCIe card, I removed the existing chip and replace with the one that requires recovery. Very fiddly reball job (using universal stencil) but I have had a lot of success using soldering/reball method (Device can be access via PC3000 portable PCIe adaptor)

This USB adaptor will save me quite a lot of time!

Again, thank you!