Question Wd140purz no power issue

[Smile13666]

Hello guys!
I faced with an issue. Hdd didn't show any activity when power connected. I heard about some tvs diodes, is it possible that problem with them? But 3 PCs that i used before for test this hdd starting normally without short...
Photo of board it attachments.

 

[Smile13666]

Power poard

 

[fzabkar]

You may need to mask off SATA power pin #3 with insulation tape. That's the PWRDIS pin.

 

[Smile13666]

You may need to mask off SATA power pin #3 with insulation tape. That's the PWRDIS pin.

As i understand its the same as connection via sata molex? I tested it - not working...

 

[fzabkar]

Near the SATA power connector you will find 4 diodes and two tiny fuses. Measure their resistances with a multimeter.

 

[Smile13666]

Checked all of them. All without beep and ~200 on a multimeter

 

[fzabkar]

http://www.users.on.net/~fzabkar/HDD/0B40385/TVS_diodes_fuses.jpg

Both fuses should beep. Their resistances should be 0.0 ohms.

Did you do this?

Warning: do not interchange modular PSU cables:
http://www.hddoracle.com/viewtopic.php?f=56&t=2545

 

[Smile13666]

Look like one of them dead. Left one is 0.01 omhs, second one is 195. Tomorrow will try to delete it and test) Result will share later. Thank you for advice!

 

[fzabkar]

Look like one of them dead. Left one is 0.01 omhs, second one is 195. Tomorrow will try to delete it and test) Result will share later. Thank you for advice!

The second one (195) is open circuit. You can flow a blob of solder over it, if there is no other problem.

I'd make sure that the PSU (and its modular cables?) are producing the correct voltages.