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 Post subject: st2000LM005
PostPosted: April 23rd, 2018, 6:52 
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Joined: December 21st, 2017, 12:28
Posts: 18
Location: cardiff
Hi, I have this seagate/samsung drive which doesn't power up, I tried a rom swap with different 100767980 pcbs but the drive doesn't spin. I tried to fix the usb board but no luck with that.
I was thinking it was a preamp issue but the the rom doesn't spin at all even when I put it on another drive.

The terminal gives me "&&&&" with patient rom and donor pcb

I am thinking the problem is the rom itself or wrong pcb compatibility.
I attach the ROM here please let me know if you have had same issue with this drive.
Thank you


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 Post subject: Re: st2000LM005
PostPosted: April 23rd, 2018, 7:28 
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here is the Patient pcb


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 Post subject: Re: st2000LM005
PostPosted: April 23rd, 2018, 7:29 
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Location: cardiff
front side


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 Post subject: Re: st2000LM005
PostPosted: April 23rd, 2018, 11:39 
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Joined: December 21st, 2017, 12:28
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Location: cardiff
here is the Rom, sorry but I attached the wrong size above


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 Post subject: Re: st2000LM005
PostPosted: April 23rd, 2018, 11:52 
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Joined: October 16th, 2013, 13:21
Posts: 574
Location: Brazil
How did you try to fix the original board ?

Can you post pictures of the new donor board you are using ?

Also, in the original board, you can try to clean the oxidation in the hda contacts. Maybe it changes nothing, but just in case.


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 Post subject: Re: st2000LM005
PostPosted: April 23rd, 2018, 12:25 
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Joined: December 21st, 2017, 12:28
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Location: cardiff
hi rogfanther,
thanks for asking, I didn't do much to the original pcb just tried to reflow the connectors close to the usb and give it a clean up.
Here is one of the donors I used


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IMG_20180423_172705.jpg
IMG_20180423_172705.jpg [ 1.93 MiB | Viewed 1106 times ]
IMG_20180423_171956.jpg
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 Post subject: Re: st2000LM005
PostPosted: April 23rd, 2018, 12:59 
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Joined: October 16th, 2013, 13:21
Posts: 574
Location: Brazil
Maybe I´m wrong, but it seems from the pictures that you transferred the flash rom chip that contains the usb bridge firmware, not the the main controller one.
In the picture you called Patient pcb, it would be the chip near the second screw hole in the top side.


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 Post subject: Re: st2000LM005
PostPosted: April 23rd, 2018, 13:49 
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Location: cardiff
I didn't have many of those drive but I thought the one that contains the bridge fw was on the outer part of the pcb, here is the rom that I swaped, please tell me is the rom otherwise would be really embarassing form me :oops:


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rom.jpg
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 Post subject: Re: st2000LM005
PostPosted: April 23rd, 2018, 13:58 
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Joined: March 19th, 2015, 15:01
Posts: 1363
Location: isreal
mrDRECula wrote:
here is the Rom, sorry but I attached the wrong size above

I was banging my head to figure out, how did you ended up with a ROM half of the size its supposed to be


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 Post subject: Re: st2000LM005
PostPosted: April 23rd, 2018, 14:13 
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Joined: October 16th, 2013, 13:21
Posts: 574
Location: Brazil
mrDRECula wrote:
I didn't have many of those drive but I thought the one that contains the bridge fw was on the outer part of the pcb, here is the rom that I swaped, please tell me is the rom otherwise would be really embarassing form me :oops:


Yes, that is the right chip. From your picture, it looked like you had soldered the bridge firmware chip, that´s why I commented on it.

Hopefully someone will correct me if I´m wrong, but if you isolate the hds contacts ( piece of paper ) does the disk spin ?


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 Post subject: Re: st2000LM005
PostPosted: April 23rd, 2018, 14:18 
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Joined: December 21st, 2017, 12:28
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Location: cardiff
@jermy I used MRT to read the rom the size is chosen manually

@rogfanther
I am not in the labnow, I will try tomorrow, but I already did the test with another donor pcb and it didn't spin, will update you tomorrow, thank meantime


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 Post subject: Re: st2000LM005
PostPosted: April 23rd, 2018, 14:47 
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Posts: 1363
Location: isreal
mrDRECula wrote:
@jermy I used MRT to read the rom the size is chosen manually

you've used MRT to read/flash the chip ?
or moved it physically ?


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 Post subject: Re: st2000LM005
PostPosted: April 23rd, 2018, 16:06 
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Joined: December 21st, 2017, 12:28
Posts: 18
Location: cardiff
I did both, rom swap to the patient pcb and as it didn't work I removed it and used the MRT rom programmer to read the chip hoping anyone could help out here.


If you have used the new MRT you should know the flash reader/programmer reads directily from the rom

I attach a pic of the reader for you in case you haven't seen it yet.

As I am a bit new to MRT I thought the programmer would pick the size automatically but you actually need to chose it manually that's why I posted the 512k file in first place. :oops:

thanks


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 Post subject: Re: st2000LM005
PostPosted: April 23rd, 2018, 16:17 
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Joined: September 8th, 2009, 18:21
Posts: 10355
Location: Australia
I have parsed the OP's ROM and it checks out OK. My tool might not be completely trustworthy, though.

Code:
Checksum of Boot Block header = 0x63  - OK
Checksum of Boot Block (Actual/Expected) = 0x7173 / 0x7173  - OK

Searching for FIPS block (expected checksum = 0x0000) ...

Found FIPS text string at 0x001000
Checksum for 0x1000 byte FIPS block = 0x0000  - OK

Searching for FLASHTBL ...

Found FLASHTBL text string at 0x002024
Parsing FLASHTBL at 0x002000 ...

ID Byt1 Byt3 Size     ROM address        RAMaddrs  Cksm (Exp/Act)
-----------------------------------------------------------------
00  00   FF  00000000 FFFFFFFF           00000000            N/A
01  40   FF  00000000 FFFFFFFF           00014D00            N/A
02  02   FF  00000300 00002000-000022FF  FFF02000  00 9A   - BAD (Note 2)
03  08   FF  00001EF4 00002300-000041F3  FFF02300  F2 F2   - OK
04  00   FF  00014CF0 000041FC-00018EEB  00000000  7B 7B   - OK
05  40   FF  00002FB0 00018EF4-0001BEA3  00014D00  DE DE   - OK
06  00   FF  00000B60 0001BEAC-0001CA0B  00080000  3A 3A   - OK
07  00   FF  00000384 0001CA14-0001CD97  00085C00  D7 D7   - OK
08  00   FF  00000234 0001CDA0-0001CFD3  00088000  F9 F9   - OK
09  80   FF  0004C790 0001CFDC-0006976B  10018000  39 39   - OK
0A  81   FF  00005548 00069774-0006ECBB  10064790  00 FB   - BAD (Note 1)
0B  00   FF  00006810 0006977C-0006FF8B  900003C0  FF FF   - OK

Searching for SERVOTBL ...

Found SERVOTBL text string at 0x071024
Parsing SERVOTBL at 0x071000 ...

ID Byt1 Byt3 Size     ROM address        RAMaddrs  Cksm (Exp/Act)
-----------------------------------------------------------------
00  02   FF  000000C0 00071000-000710BF  FFF71000  00 3A   - BAD (Note 2)
01  00   FF  0000CED0 000710C4-0007DF93  00000000  6A 6A   - OK
02  00   FF  00000F68 0007DF9C-0007EF03  00080000  80 80   - OK


Size            - size of module in ROM expressed in bytes
ROM address     - absolute address range of module in ROM
RAMaddrs        - load point of module in RAM
Cksm (Exp/Act)  - Expected Checksum / Actual Checksum


Note 1:  The address range of affected module may conflict with another module,
          in which case this is probably a false negative.

Note 2:  If this module is the FLASHTBL or SERVOTBL, then this is most likely
          a false negative.

Note 3:  This may or may not be a genuinely BAD module. Examine the checksum
          of the first half of the ROM. If 0x0000, then module is probably OK,
          otherwise it may or may not be bad. Also examine the "adjusted"
          checksum, if applicable.

Note 4:  The address range of the module is outside the limits of the ROM.

_________________
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 Post subject: Re: st2000LM005
PostPosted: April 23rd, 2018, 16:28 
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Joined: September 8th, 2009, 18:21
Posts: 10355
Location: Australia
If the OP's serial TTL adapter is a 3.3V type, then it may have difficulty communicating with a 1.8V "PCBA I/O Voltage". I would also be concerned about the possibility of powering a 1.8V preamp from a 2.5V supply, if indeed that is what the following ROM excerpt is implying.

Code:
Offset(h) 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F

0000D570                                            50 43                PC
0000D580  42 41 20 49 2F 4F 20 56 6F 6C 74 61 67 65 20 3A  BA I/O Voltage :
0000D590  20 32 2E 35 56 0A 00 00 25 6E 50 52 45 41 4D 50   2.5V...%nPREAMP
0000D5A0  20 3A 20 32 2E 35 56 0A 00 00 00 00 25 6E 50 43   : 2.5V.....%nPC
0000D5B0  42 41 20 49 2F 4F 20 56 6F 6C 74 61 67 65 20 3A  BA I/O Voltage :
0000D5C0  20 31 2E 38 56 0A 00 00 25 6E 50 52 45 41 4D 50   1.8V...%nPREAMP
0000D5D0  20 3A 20 31 2E 38 56 0A 00 00 00 00 25 6E 46 4C   : 1.8V.....%nFL
0000D5E0  41 53 48 20 3A 20 38 4D 62 69 74                 ASH : 8Mbit

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 Post subject: Re: st2000LM005
PostPosted: April 23rd, 2018, 16:43 
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Joined: March 19th, 2015, 15:01
Posts: 1363
Location: isreal
what about a donor ROM ?
have you tried it ?
does it spin up with a donor ROM (same F/W ver.)?


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 Post subject: Re: st2000LM005
PostPosted: April 23rd, 2018, 16:54 
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Joined: December 21st, 2017, 12:28
Posts: 18
Location: cardiff
Many Thanks fzabkar

As I said above I used the programmer to read the rom, I need to check tomorrow but am pretty sure it uses 3.3V type to read.

If the rom is ok this should move the problem on the pcb(probably incompatible) or the preamp

As for the preamp I did test it putting a paper between the pcb and the heads but the drive didn't spin

I believe I am using an incompatible pcb as the patient HDA with donor pcb and donor rom doesn't spin also I tried the patient rom and donor pcb combo on different donor HDAs and it didn't spin on any of them.

That's why I thought the rom was corrupted and I was hoping you could confirm it but now I don't have any clues... :?


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 Post subject: Re: st2000LM005
PostPosted: April 23rd, 2018, 16:57 
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Joined: December 21st, 2017, 12:28
Posts: 18
Location: cardiff
@jermy
sorry I was writing the answer for fzabkar, as I was saying to fzabkar I tried and didn't work, to be honest I didn't check if they had the same fw, tomorrow I will check,

thanks jermy


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 Post subject: Re: st2000LM005
PostPosted: April 23rd, 2018, 17:02 
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Joined: September 8th, 2009, 18:21
Posts: 10355
Location: Australia
@mrDRECula, what are the voltages at the serial TTL Tx/Rx pads? Are they 1.8V or 2.5V?

BTW, if you isolate the HDA, then the PCB fimware has no way to identify the preamp, in which case it will not command the drive to spin up.

_________________
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 Post subject: Re: st2000LM005
PostPosted: April 23rd, 2018, 17:36 
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Joined: March 19th, 2015, 15:01
Posts: 1363
Location: isreal
if the donor and patient have different preamp the drive will not spin


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