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ddrecovery
 Post subject: HTS725032A9A364 - Bad Heads ?
PostPosted: August 26th, 2014, 18:19 
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This drive had a burnt out board. Looked like liquid had been spilled on the laptop. Installed new board and NV-RAM swap. Drive comes DRD without clicking. I can read/write NV-RAM okay. Switched off heads in RAM. Any interaction with the drive causes it to either go BSY (and stay BSY) or ERR UNC. Is this bad heads?

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pcimage
 Post subject: Re: HTS725032A9A364 - Bad Heads ?
PostPosted: August 27th, 2014, 3:59 
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Listen very carefully to the drive when powering up, do you near the heads come off the ramp and sweep the platters?

Compare the sound to a good drive if you're unsure.

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ddrecovery
 Post subject: Re: HTS725032A9A364 - Bad Heads ?
PostPosted: August 27th, 2014, 13:17 
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The heads do come off the ramp. However it does make a different sound to a good drive. With the good drive it sounds like to heads come off the ramp, sweep the platters and gives a short electronic buzz/vibration when it reads data. The bad drive comes off the ramp and sweeps, but doesn't sound like its reading data.

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ddrecovery
 Post subject: Re: HTS725032A9A364 - Bad Heads ?
PostPosted: August 27th, 2014, 14:40 
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Further to this I just opened the drive in the cleanroom. The heads do pass over the platters briefly when spinning up.

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pcimage
 Post subject: Re: HTS725032A9A364 - Bad Heads ?
PostPosted: August 28th, 2014, 10:09 
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Ok. Is the new ROM version compatible with the original NVRAM version?

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ddrecovery
 Post subject: Re: HTS725032A9A364 - Bad Heads ?
PostPosted: August 28th, 2014, 20:41 
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Looks to me like they are??


Attachments:
ROM.txt [688.2 KiB]
Downloaded 556 times
NV-RAM.txt [2.58 KiB]
Downloaded 559 times

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pcimage
 Post subject: Re: HTS725032A9A364 - Bad Heads ?
PostPosted: August 29th, 2014, 2:58 
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Looks like it, and "VLG1XRBCL" is the serial number of the drive?

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ddrecovery
 Post subject: Re: HTS725032A9A364 - Bad Heads ?
PostPosted: August 29th, 2014, 14:32 
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pcimage wrote:
Looks like it, and "VLG1XRBCL" is the serial number of the drive?

Hmm. No its not. It is a donor board with the chip swapped. The full serial number of this drive is 091127PC6J00VQG10JWA, so I am assuming it just details the last few digits.

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pcimage
 Post subject: Re: HTS725032A9A364 - Bad Heads ?
PostPosted: August 29th, 2014, 16:13 
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Then the PCB is not original, or you have moved the wrong chip.

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ddrecovery
 Post subject: Re: HTS725032A9A364 - Bad Heads ?
PostPosted: August 29th, 2014, 16:28 
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Here is the chip I moved.


Attachments:
Chip.jpg
Chip.jpg [ 969.01 KiB | Viewed 7682 times ]

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pcimage
 Post subject: Re: HTS725032A9A364 - Bad Heads ?
PostPosted: August 29th, 2014, 16:31 
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Wrong one! That's the ROM.

There should be a smaller (NVRAM) one, U6 from memory (at home now).

Won't hurt to move both, so move the NVRAM and you should be good to go!

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ddrecovery
 Post subject: Re: HTS725032A9A364 - Bad Heads ?
PostPosted: August 29th, 2014, 16:48 
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Thanks...

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