kinda urgent swap bios on seagate 80gb pcb

So I have an seagate ST380013AS 80gb and (please see att images) it fried out a chip onboard pcb. Unit was transfered from an old dell dimension to a dell optiplex 380 and booted up no problem. It was left on over night and I come into work this morning to find it bluescreened to 0x0F4 ... investigation led to discovering a catastrophic failure of one of the chips...

luckily I have one of these boards from a donor drive but I need to identify which is the bios chip. I think I have it narrowed down to chip id: E3P102 2515 or possibly 25P05AV - 9515m . I think it is the E3P102 - 2515 as these are the only 2 identical chips on both boards.
The board identifiers are exactly the same 100336321 REV: A although there is some slight differences in the chips used except the one mentioned

See attached images which shows the failure of the board from the original drive.

could someone confirm please that I am in the right direction? That Chip E3P102 is indeed the bios chip requiring transfer?

thnx in advance

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These pictures are exactly the same, no?

HaQue wrote:These pictures are exactly the same, no?

yes sorry I posted 2 but it seems to have repeated the second...attached the second there showing the full board...

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computek wrote:... I need to identify which is the bios chip. I think I have it narrowed down to chip id: E3P102 2515 or possibly 25P05AV - 9515m . I think it is the E3P102 - 2515 as these are the only 2 identical chips on both boards.
The board identifiers are exactly the same 100336321 REV: A

The serial flash memory IC would be connected to the MCU, ergo it must be the "25P05AV".

The "E3P102" is connected to a coil, ergo it must be a power component.

"2515" and "9515m" appear to be YWW date codes, ie week 15 of 2005.

Thanks for the help guys... I have the donor board fitted to the drive but when I try to access [using pc3000] the drive is clicking ... I have tried to connect via just the com port but not sure what to do here ...

If I swapped the 25P05AV over or do i need to re write the firmware? If the latter a little guidance on how? I take it by seagate tools you mean seagate tools within pc300/ or do they have there own tools?

FW version [original dr] 8.12
FW version [donor] 3.40

Switch the "ROM" chip over and see what happens then.

so managed to get back to this (my apologies been busy - one has to earn a living as well ^_^ )

So the log I have (see attached ) I think looks like you are saying that it dropping to F> - I'm hoping thats a good position to be in?

This would indicate that I require the correct firmware ? And I have one of two option - move the old ROM chip or write the firmware via TTL

moving the chip is likely the simpler option but I would like to know the latter option as well? I take it TTL is via the terminal/Com port connection? having never done this before I'd prefer not do it on a customer drive first time though I do have plenty of practice drives... I did see an option to read or write ROM when I was connected via com port - I take it that this would be the function I would use tow rite the replacement firmware?

Sorry for all the questions - its just I don't normally use the more advanced options and generally use it for data recovery on drives that can't be seen any more or have a lower level issues that are easily over come in the data recovery option.

thnx for all the help - very much appreciated

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kinda urgent swap bios on seagate 80gb pcb