HDD GURU FORUMS

Hello,

I have a WD5000BMVW 500GB USB disk. No clicking sound and do not recognized on PC.
I swap ROM chip from USB PCB 771814 to SATA PCB 771820. Then connect it to PC3000 and no green lights on PC3000, seems disk is dead but I swap the ROM chip to 3 different SATA 771820 and same result.

Any idea why do not work?

Rgds,

swapped physically or flashed the ROM

swapped physically

try to read the ROM with an external programmer (or any other way), and take a good working PCB and flash the ROM with a programmer or using PC3K.

jermy wrote:try to read the ROM with an external programmer (or any other way), and take a good working PCB and flash the ROM with a programmer or using PC3K.

+ 1 Agree.

Its either the ROM checksum doesn't pass or pre-amp.

Hello!

I found myself in a similar situation and it was the ROM, damaged. So i had to rebuild ROM from SA using PC3K and flash it to a donor PCB.

<Good luck

Yeah it is ROM damaged.

AdrianSRD, was your disk a USB drive like mine? Which type of donor you choose, a match USB drive?
I was speaking with ACE Support and their solution is just for drives with internal ROM (no U12 chip). My disk has an external ROM.

Any other ideas?

what's the DOM ?

Do you mean DCM?

the disk is:
WD5000BMVW-11AMCS4
Date: 8 June 2012
DCM: HHOT2HN

Rgds,

can you upload the damaged ROM ?

Miss Di wrote:Hello,

I have a WD5000BMVW 500GB USB disk. No clicking sound and do not recognized on PC.
I swap ROM chip from USB PCB 771814 to SATA PCB 771820. Then connect it to PC3000 and no green lights on PC3000, seems disk is dead but I swap the ROM chip to 3 different SATA 771820 and same result.

Any idea why do not work?

Rgds,

Hi ,
Have You Ruled out a Possible HSA Short ? . Do You Know How To Test that if Not i Can Teach You

It's good to share us that

eng.mas wrote:It's good to share us that

Hi ,
If you wanna learn ,post a new thread and pm me the link of the same i will do the needful .In this thread i will is the thread opener wants .

Hello,

Amarbir, If it is a HSA Short, would the disk try to read with a good PCB from another disk (without ROM changed)? Can you please share with us how to test HSA Short?

Jermy, I can read the ROM in the TL866. File attached.

Thanks.

ROM file now attached. Please change the extension to .bin

Amarbir wrote:

eng.mas wrote:It's good to share us that

Hi ,
If you wanna learn ,post a new thread and pm me the link of the same i will do the needful .In this thread i will is the thread opener wants .

Ok, Ill do as u want

The ROM looks OK.

Code:

Analysing ROM_WD5000BMVW.bin ...

Searching for LDSCs and verifying PCMBlocks ...

LDSC   LDSC    PCMBLock       PCMBlk CS
Start  ID CS   Start - End     Exp/Act
---------------------------------------
00000  5A 81   00100 - 019B1  B992 B992   OK
00020  01 59   019B2 - 03A1A    03   03   OK
00040  02 78   03A1B - 0D653    95   95   OK
00060  03 03   0D654 - 0DB08    17   17   OK
00080  04 93   0DB09 - 0DD69    77   77   OK
000A0  05 28   0DD6A - 0DF8A    B9   B9   OK
000C0  06 59   0DF8B - 2AC07    59   59   OK
000E0  07 CF   2AC08 - 3DF88    D3   D3   OK

LDSC   = PM Loader Config String (32 bytes)
ID     = ID byte of LDSC (byte #0)
CS     = Checksum byte or word
PCMBlk = Program Code Memory Block
Exp    = Expected checksum for PCMBLock
Act    = Actual checksum for PCMBLock

Code:

4F.BIN: 1024 bytes      checksum32 = 0x00000000
47.BIN: 1024 bytes      checksum32 = 0x00000000
0D.BIN: 144 bytes       checksum32 = 0x00000000
30.BIN: 1024 bytes      checksum32 = 0x00000000
0B.BIN: 336 bytes       checksum32 = 0x00000000
0A.BIN: 64 bytes        checksum32 = 0x00000000

If you want to test for a shorted preamp, upload detailed photos of both sides of your PCB.

Thanks fzabkar,

Here are the PCB photos. The ROM is not on the photo as I took it out to read in TL866.

Can you measure the voltages between ground (any screw hole) and each of the 18 pins at the HDA connector on the PCB?

Hello,

Just measure the voltage as suggested and I got value between 0.13V to 0V.
What should be the expected values?
What are we testing here?

Rgds,