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Howto to repair a knocking HITACH Deskstar HDT72550VLAT80
http://forum.hddguru.com/viewtopic.php?f=11&t=8979		 Page 1 of 1
Author:  malicksarr [ May 9th, 2008, 8:40 ]
Post subject:  Howto to repair a knocking HITACH Deskstar HDT72550VLAT80
Does somebody know how to repair a clicking HDT72550VLAT80 with PC3000.
Author:  pepe [ May 10th, 2008, 5:50 ]
Post subject:  Re: Howto to repair a knocking HITACH Deskstar HDT72550VLAT80
Hi,

if u have a genuine tool, U should also have some info about what problems may cause such symptoms and also have some idea that in 95% of the cases it is not possible to repair the drive using ANY SW.

pepe
Author:  HDDTECH [ May 11th, 2008, 18:57 ]
Post subject:  Re: Howto to repair a knocking HITACH Deskstar HDT72550VLAT80
Most of the time Knocking Hitachi has HDA problem , Replace and see if fix it
Author:  malicksarr [ May 12th, 2008, 1:04 ]
Post subject:  Re: Howto to repair a knocking HITACH Deskstar HDT72550VLAT80
I swapped PCB an d now I think that NRAM is corrupted. How to recover.
Author:  rchadwick [ May 12th, 2008, 2:11 ]
Post subject:  Re: Howto to repair a knocking HITACH Deskstar HDT72550VLAT80
Diagnose properly, then fix. I always say... If your only tool is a hammer, your problems start looking like nails.
Author:  malicksarr [ May 12th, 2008, 12:05 ]
Post subject:  Re: Howto to repair a knocking HITACH Deskstar HDT72550VLAT80
I sure. My PCB NVRAM's is corrupted
Author:  rchadwick [ May 12th, 2008, 12:18 ]
Post subject:  Re: Howto to repair a knocking HITACH Deskstar HDT72550VLAT80
If you have the skills to diagnose corrupted NVRAM, then fixing ths should be easy for you. Best of luck.
Author:  malicksarr [ May 12th, 2008, 12:36 ]
Post subject:  Re: Howto to repair a knocking HITACH Deskstar HDT72550VLAT80
Your are very negative. I a document from salvation its clearly explain that PCB swap corrupt NVRAM. Where is the problem. If you want to help me it's ok. Otherwise don't bother.
Author:  rchadwick [ May 12th, 2008, 12:56 ]
Post subject:  Re: Howto to repair a knocking HITACH Deskstar HDT72550VLAT80
I'm happy to help, but if you want helpful answers, you have to ask better questions, and be able to accept the answers.

Again, best of luck in your recovery.
Author:  rameez [ May 17th, 2008, 12:16 ]
Post subject:  Re: Howto to repair a knocking HITACH Deskstar HDT72550VLAT80
I think u did not diagnose the problem correctly how can u say that nvram is currupt ?
Author:  shahij [ May 18th, 2008, 15:47 ]
Post subject:  Re: Howto to repair a knocking HITACH Deskstar HDT72550VLAT80
u dont need to make question after accurate diagnose... Your tool is a professional tool, try to diagnose properly.
best of luck.
Author:  salvationlaura [ May 19th, 2008, 4:30 ]
Post subject:  Re: Howto to repair a knocking HITACH Deskstar HDT72550VLAT80
Hi,

Why not try HD Doctor for Hitachi?

NVRAM repair , see the details at http://support.salvationdata.com/tutorial.htm.

I hope it will help you, if you want to purchase the products, please contact me at sales.laura@salvationdata.com.

Best Regards,

Laura

malicksarr wrote:
Your are very negative. I a document from salvation its clearly explain that PCB swap corrupt NVRAM. Where is the problem. If you want to help me it's ok. Otherwise don't bother.
Author:  pepe [ May 19th, 2008, 12:15 ]
Post subject:  Re: Howto to repair a knocking HITACH Deskstar HDT72550VLAT80
Hello Laura,

why would he spend his money unless sure about it will help? (I understand U of course :), but he won't be very happy with a tool not appropriate for this particular case... This is not your interest either.
Since I believe 90% of clicking is caused by bad head it would be needless to buy any FW repair tool in the first turn I think.
Good diagnosis is the most important thing in this field.
If one doesn't have the faintest idea what's going on in a HDD he should not mess with it until he gains some knowledge and the right way of thinking. This won't come at a glance, for this U need to spend years in electronics and HDD technology. This cannot be gained on a forum.

pepe
Author:  malicksarr [ May 22nd, 2008, 17:42 ]
Post subject:  Re: Howto to repair a knocking HITACH Deskstar HDT72550VLAT80
Hi

I tried to debug my hdd with PC3000 and the log window clearly says that NVRAM is corrupted! Perhaps, head stack is also out of order but NVRAM corruption is real.



Best regards
Author:  beto [ May 23rd, 2008, 9:28 ]
Post subject:  Re: Howto to repair a knocking HITACH Deskstar HDT72550VLAT80
u are not understanding !! and no body want to help u, if u dont believe what experts told u .the log wich u got , doesnt means the NVRAM its damaged, means the PC3000 System cannot access because u hdd its not answering, all right?

Best Regards
Author:  BGman [ July 30th, 2008, 7:23 ]
Post subject:  Re: Howto to repair a knocking HITACH Deskstar HDT72550VLAT80
If the NVRAM is corrupted , the drive doesn't click... :lol:
Author:  hddguy [ August 7th, 2008, 4:58 ]
Post subject:  Re: Howto to repair a knocking HITACH Deskstar HDT72550VLAT80
malicksarr wrote:
I swapped PCB an d now I think that NRAM is corrupted. How to recover.



If you swap PCB then NVRAM is likely ot be different, and incompatible not corrupt. You need to access this HDD using the patient NVRAM.

I do believe that even with the correct NVRAM on a donor PCB the HD will still click. There are around 4 opinions that there is HDA damage, 4 opinions from 4 different experts who's judgement i would trust.

Put original PCB back, and replace heads. Good luck
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