MK4021GAS can't spin up

[Hee]

Hello.

MK4021GAS can't spin up.

when i try swap other hdd's PCB, it spin up.

so, i think PCB problem.

is it possible swap same model's PCB?

if not

i want to know what chip has firmware on PCB.

MK4021GAS PCB

thanks.

[DR-Kiev]

Hello.

MK4021GAS can't spin up.

when i try swap other hdd's PCB, it spin up.

Check both 0-resistors near D1

[Hee]

Hello.

MK4021GAS can't spin up.

when i try swap other hdd's PCB, it spin up.

Check both 0-resistors near D1

i'm already check it, by multi tester's continuity test.
when i check it, sounds beep.
so i think 0-resistors fine.

is it wrong?

[fzabkar]

when i check it, sounds beep.
so i think 0-resistors fine.

is it wrong?

That's fine. However, they're not resistors, but 2A fuses, assuming I'm looking at the same components.

Littelfuse Surface Mount Fuses (N = 2A, S = 4A):
http://www.farnell.com/datasheets/48294.pdf

[DR-Kiev]

MK4021GAS can't spin up.


is it possible swap same model's PCB?

No.

i want to know what chip has firmware on PCB.

This one:

Attachments

DSC_0024[2].JPG (40.72 KiB) Viewed 4446 times

[Hee]

MK4021GAS can't spin up.


is it possible swap same model's PCB?

No.

i want to know what chip has firmware on PCB.

This one:

Thanks.
i'll try it.