HTS421280H9AT00 Does not spin

[D_R]

Hey Guys,

I have a problem with a HTS421280H9AT00 drive. The drive does not spin, and wasn't recognised at all. The diodes were ok. I got a donor board for the drive, with the donor, the drive started to spin, but - of course - I wasn't able to get the data. So I transferred the flash chip from the patient board to the donor board.

But now the drive does not spin with the donor board with the patient flash on it. But I got a RDY Signal. And I was able to read the ROM with PC3k, so I think that there is something wrong with the firmware.

Does any one have an idea, what I can do? I attached the ROM to this posting.

Attachments

ROM.rar

(36.65 KiB) Downloaded 291 times

[fzabkar]

Doesn't your PCB have a separate NVRAM chip?

[pcimage]

Doesn't your PCB have a separate NVRAM chip?

Should have one @ U6

I expect the OP has switched ROM @ U3 only.

If the FW version of the ROM doesn’t match the NVRAM then the drive won’t spin up.

[D_R]

I expect the OP has switched ROM @ U3 only.

I just switched the U6.... Okay, so I have to switch the U6....

[D_R]

Just for my understanding, the U3 Chip is the NVRam chip and the U6 Chip is the ROM chip, right?

Because I transferred now the U3 Chip, but there was no result. I read the NVRam and ROM before I transferred the second chip. The ROM file was the same, but the NVRam Data changed a little bit. But with the same result, the drive does not spin up.

Attachments

NV-RAM.rar

(204 Bytes) Downloaded 301 times

[fzabkar]

Can you show us a photo of your PCB?

BTW, your NVRAM dumps are bad. How are you dumping the NVRAM?

[pcimage]

Just for my understanding, the U3 Chip is the NVRam chip and the U6 Chip is the ROM chip, right?

Because I transferred now the U3 Chip, but there was no result. I read the NVRam and ROM before I transferred the second chip. The ROM file was the same, but the NVRam Data changed a little bit. But with the same result, the drive does not spin up.

Read my post, ROM is U3 (the larger chip)

[pcimage]

Can you show us a photo of your PCB?

BTW, your NVRAM dumps are bad. How are you dumping the NVRAM?

Agreed, your NRAM reads are garbage.

Attached is sample NVRAM from this model...

Your ROM version appears to be A70G like this sample NVRAM, so if the NVRAM is corrupt then you'll have to try a "NVRAM search" in a FW tool like PC3000 (or actually the Salvation tool is quite good at this!)

Attachments

NV-RAM.rar

(343 Bytes) Downloaded 279 times