WD Hdd no power no spin

logic01 · Sep 18, 2013

Hi everyone,

My WD hdd recently stopped power up and no spin at all. I had checked the pcb no any obvious damage on it. I even tried to dis-solder the D4 component still failed to power it on.

Hdd model: WD5000AACS
PCB model: 2061-701444-K00 AB

Could anyone help on this?

fzabkar · Sep 18, 2013

Was D4 shorted?

logic01 · Sep 18, 2013

fzabkar :

I got measured and don't think it is shorted. But I also removed it (D4) to try my luck but too bad it's the same. Last week when I boot up pc it happened did not show the secondary hdd in windows, after I reboot then it's fine. Yesterday when boot up pc again the hdd cannot be detected anymore (no power, no spin, no detected in BIOS).

fzabkar · Sep 18, 2013

The drive's original symptom may have responded to cleaning the J1 contacts with a soft white pencil eraser, but I don't know about your no-spin problem. It does look like a PCB fault, but your PCB does not have a chip at location U12, so a board swap is not a DIY proposition.

Try the eraser trick, anyway.

logic01 · Sep 18, 2013

fzabkar :

I had tried the eraser trick at sata and power port contacts on pcb only. Later on I will try on J1 contacts. You are correct, my pcb does not have U12 chip. It use Marvell (8816745-TFJ1) controller chip. If really a pcb faulty, do I need to get an exactly same part number pcb as replacement?
Is there any other way that you think I can do to power on my hdd? A lot of important data I needed was inside. haizzz....

fzabkar · Sep 18, 2013

The Marvell MCU contains unique, drive specific "adaptive" data. These data would need to be transferred to your replacement PCB. It is highly unlikely, although not impossible, that a donor PCB will work without such a transfer.

If you have a multimeter, there are a few voltage test points that we could check. It may only be a post mortem exercise, though.

logic01 · Sep 18, 2013

fzabkar :

I have multimeter. Which points should I check?

fzabkar · Sep 18, 2013

Measure Q4 near the SATA power connector. That's the +3.3V Vio supply.

Measure the voltages at the inductors around the SMOOTH chip, and look for the -5V supply at J1.

Be careful not to slip with your probes, as severe danage may result.

logic01 · Sep 19, 2013

fzabkar :

Can you help to highlight the location for measurement point?

fzabkar · Sep 19, 2013

Upload a photo and I'll identify the test points.

logic01 · Sep 19, 2013

fzabkar :

I had uploaded the photo at previous post. In case you cannot view it you may refer below link:
http://imageshack.us/photo/my-images/138/2cex.jpg/

fzabkar · Sep 19, 2013

Sorry, I've blocked a lot of "content" to make my forum experience bearable. That's why I missed your photo.

Anyway, here are your test points:
http://www.users.on.net/~fzabkar/HDD/2060-701444/

Use a screw hole or SATA ground as your 0V reference.

logic01 · Sep 19, 2013

fzabkar :

These are the results I'm get:
J1:
+5V = 0.054V
-5V = 5.155V

D2 = 0.055V

Q4:
+3.3V = 0.182V
+5V = 5.157V

For the Vcore I cannot get any valid reading, multimeter reading ~0V.

Do you have any idea with the results? Or you need more data?

fzabkar · Sep 19, 2013

The SMOOTH chip generates the +3.3V, +1.2V, and -5V supplies. Therefore it would appear that this chip may be dead, or it may not be getting its +5V and +12V supplies. I can't do much more for you without having the PCB in front of me, and even then I may not be able to help.

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