First tell us exactly what you committed with your hdd during the attempted fix. The more detailed info you give, the better the chance that we can understand what went wrong.
ok, here goes..
well having received the drive back from the 'free diagnosis' form the data recoverer, i connected the drive back to my PC as an internal and discovered that it spins up, although did not show in BIOS. it was identified through disk management but was 'unknown' and needed initializing.
now, my freind /neighbour is more technical than I am so we have all the cables and adaptor (inclusive of nokia modified cable) ready to attempt the BSY fix, or at least try and get something through hyperterminal as a first thing.
as a first attempt, we were not succesful in getting the HDD to power up, which could be a result in the fact it wasnt talking to our independant PSU???, which was being used from its red cable molex only, in orer to power it up...... he suggested we take a look again to see if the drive was appearing through BIOS, but on HIS pc instead of mine..... it was. however it was showing only a total of 7.87GB and of course the firmware as previously stated as ZZ7L.
This drive should be a total of 640GB and has near 423GB of my data on it!
(i'd like to point out again that the HDD had a firmware of SD33 Prior to its 'free diagnosis' ... they changed it during the week they had the drive...they also said that it WASN'T the BSY fix and that they quouted £300 to get my data back. )
here is what the recoverer has actually said:
'Your drive has multiple failures. It would appear that media issues have caused a firmware lockout, so one problem would have to be resolved before fixing the next one.'
during the session at my friends, we connected the drive using the RX and TX, and tried to check that we were getting the right connections. my freind set up hyperterminal and checked that this matched...however, the actual drive would not spin up.
My freind then suggested we just get the firmware update on the drive, and downloaded the 'Brinks' SD1 something or other firmware, however...he nearly messed his own PC up by this... so aborted.
I am now at home again and connected the drive to my PC, to have another look through Seatools...its firmware is now displaying nothing...blank. which makes me think did he actually wipe off the ZZ7L Firmware? is that possible?
looking forward to your feedback, i'll answer further questions as simply as i can.