HTS725032A9A364 - Bad Heads ?

[ddrecovery]

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?

[pcimage]

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.

[ddrecovery]

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.

[ddrecovery]

Further to this I just opened the drive in the cleanroom. The heads do pass over the platters briefly when spinning up.

[pcimage]

Ok. Is the new ROM version compatible with the original NVRAM version?

[ddrecovery]

Looks to me like they are??

Attachments

ROM.txt

(688.2 KiB) Downloaded 556 times

NV-RAM.txt

(2.58 KiB) Downloaded 559 times

[pcimage]

Looks like it, and "VLG1XRBCL" is the serial number of the drive?

[ddrecovery]

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.

[pcimage]

Then the PCB is not original, or you have moved the wrong chip.

[ddrecovery]

Here is the chip I moved.

Attachments

[pcimage]

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!

[ddrecovery]

Thanks...