How to start troubleshooting non working hard drive

[John1]

I have HGST drive, model HTS541010A9E680 which does not have any reaction - when connected to computer.
Pictures are included.
Can you please advise troubleshooting process?
I have practice in logic boards of cell phones and tablets reparing but not in hard drive reparing.
Thank help

Attachments

[fzabkar]

Measure the voltage across the "A1" TVS diode near the SATA power connector. If +5V is missing, then test for shorts to ground at this point. Also test the tiny smt fuse (or inductor?) at the SATA 5V pins.

https://pinoutguide.com/Power/sata-power_pinout.shtml

[John1]

I have 5V on the diode and also on SATA.

I also measured some other voltages on the logic board , but it is not easy to find a problem without a schematic.

Are there datasheets for that TLS2601HDCARG4 and 88i9305-TLA2 available?

Thank you for help

[suricate.ch]

Any history. Are you sure it's the original HDD board ?

[fzabkar]

What are the voltages at V1 and V2?

Attachments

V1.jpg (105.84 KiB) Viewed 4671 times

[fzabkar]

Any history. Are you sure it's the original HDD board ?

The date code on the PCB is 1321, ie week 21 of 2013.

The manufacture date on the label is 4 July, 2013.

Therefore the PCB is probably native (or a very close match).

BTW, I expect that V1 and V2 are +1.2V (Vcore) and +2.5V (Vio). Both the ROM and SDRAM require a 2.5V supply.

[fzabkar]

Just saw this:

https://sep.yimg.com/ay/yhst-14437584971410/91711083-6.gif

The RV sensor in the top left corner has fallen off.

[John1]

Thank you for your replies.
I have these voltages:
V1 is 0.87V
V2 is 2.53V
Picture you posted,
https://sep.yimg.com/ay/yhst-1443758497 ... 1083-6.gif
saying
The RV sensor in the top left corner has fallen off
is not of my logic board.
I am enclosing the correct picture again

V1 seems rather low, what do you think?

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[fzabkar]

The Vcore voltage for older ARM cores was 1.2V. Later cores operated at 0.9V. I can't recall when the change happened.

The most expedient approach would be to purchase a donor PCB and transfer the "ROM" (LE25FU406C).

The only other possibility I can think of is that the drive may be configured to Power Up In Standby (PUIS). A tool such as HDAT2 can disable PUIS.

[John1]

Thank you for your reply.
if I connect the harddrive to a computer and try to install Linux on the computer, the drive will be detected, even if in PUIS mode?

[fzabkar]

AFAIK, Linux will automatically spin up any PUIS-enabled drive.

[John1]

I tried under Linux but the harddrive was not detected either.
Do you have any other idea what I should try, except the logic board replacement?
Are there datasheets for that TLS2601HDCARG4 and 88i9305-TLA2 available?
Thank you for help

[fzabkar]

I am not aware of any datasheets for the MCU or motor controller.

I would dump the contents of the "ROM", but you must not damage this chip. It contains information that is unique to each drive.

[John1]

But what is the point in dumping of the ROM?
Checking that ROM is working?
Or test anything else?
I do not know what exactly the content should be.

[fzabkar]

If the ROM is corrupt, the drive will not come ready. I can verify the checksum of one portion of the ROM ("NVRAM").