Data recovery and disk repair questions and discussions related to old-fashioned SATA, SAS, SCSI, IDE, MFM hard drives - any type of storage device that has moving parts
January 24th, 2025, 4:53
Hi,
Got this WD1200BEVS-60UST0 with PCB model 2061-701499-600 AB.
No spin, completely dead. Diodes are ok. No shorts on power lines. Chips seem to be uncracked.
Plugging PCB only to the PC it's undetected, but that's to be expected cause the FW is on the platters.
Anybody came across this issue or ever fixed it?
January 24th, 2025, 5:18
It seems like the 1.2v rail is not there... I get 0v on it. And the SMOOTH L720b chip gets warm overtime. Any ideas?
January 24th, 2025, 7:58
The 1.2V rail is Vcore, in which case the MCU could be faulty. What is the resistance between Vcore and Ground? If it is close to 0, then check the bypass capacitors on this rail for shorts.
January 24th, 2025, 7:59
fzabkar wrote:The 1.2V rail is Vcore, in which case the MCU could be faulty. What is the resistance between Vcore and Ground? If it is close to 0, then check the bypass capacitors on this rail for shorts.
Vcore to GND is 92 ohms.
In the meantime I'll check the caps for shorts.
January 24th, 2025, 8:10
Okay all caps and coils look fine.
Any ideas?
January 24th, 2025, 10:04
A resistance of ~100 ohm for Vcore is normal. It would appear that the SMOOTH IC is faulty, but check the inductor for continuity.
January 24th, 2025, 10:13
fzabkar wrote:A resistance of ~100 ohm for Vcore is normal. It would appear that the SMOOTH IC is faulty, but check the inductor for continuity.
All inductors are okay. All show <1 ohm. Do you have any idea if 320gb WD scorpios would have the same IC? It'll be a while tilt I can get a look at my scrap bin.
January 24th, 2025, 10:44
Okay I found an identical PCB (this one has 500 instead of 600 at the end and came out of an 320gb drive) but has the M on the marvell chip replaced with N. This one does nothing but the marvell chip gets warm when I plug in the sata connector.
fzabkar, Do you know anything else we could do before swapping the SMOOTH IC?
January 24th, 2025, 18:52
Are you able to reach the SA with a working donor PCB and the demo version of WDMarvel? If you can dump the SA modules in the range from 0x100 to 0x109, then it may be possible to recreate the ROM.
January 25th, 2025, 4:00
fzabkar wrote:Are you able to reach the SA with a working donor PCB and the demo version of WDMarvel? If you can dump the SA modules in the range from 0x100 to 0x109, then it may be possible to recreate the ROM.
Problem is, the donor has bad heads. The full model of it is WD3200BMVS-11F9S0.
March 22nd, 2025, 11:03
Okay I have tried an PCB from an wd3200budt and it spun! And ofc the heads clicked and at the end of the day head 0 crashed and flew off..... Since that is head 0 the whole FW is located on that side so chances it will works are minimal (1 platter 2 head. And it still clicks now so chances are close to 0.
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