Hi!
Yesterday my Samsung r780 laptop crashed and when I restarted it, the bios could't detect HDD anymore.

I did a little research and I found out that the HDD doesn't start up (motor doesn't spin).
I look up on the internet and found that it might be broken PCB.
I tried to order a new one or buy same HDD but I could found one.

Can you please help me?
Thank you!

Laptop's HDD:
Samsung
Model: HM641JI
HDD P/N: HM641JI/SCC
Rev. A
F/W: 2AJ10001

PCB Specification:
ZZ REV.7
20100507
C3B 3188

Mercury REV.07
R00

I think you should post in a different section.

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If you have a multimeter, we could do a little troubleshooting before you spend any money.

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A backup a day keeps DR away.

I bought one today. How do I do troubleshooting?
Probably I should do a voltage check, but I don't know where to start.

Disconnect the board from the drive and power it up on its own. Then measure the voltages at the Vcore and Vio test points:
http://www.users.on.net/~fzabkar/HDD/HM ... re_Vio.jpg

Also measure the preamp supply pins:
http://www.users.on.net/~fzabkar/HDD/HM ... mp_VCM.jpg

Use any screw hole as your ground reference.

_________________
A backup a day keeps DR away.