This seems to be a really good thread, which has helped me get so very close to repairing my BWT-850EB. Special thanks to jonoro for all the advice, which has given me the confidence to get this far.
I'm trying to replace the HD on my BWT-850. The original HD is very dead, killed by a thunder storm 2 yrs ago! Long since gone in the bin, so no chance of copying the original int bin file mentioned above. Everything else about this machine is good. Power supply, etc. have been checked.
I have two possible replacement HD's, both 1tb, a Toshiba DT01ABA100V (like the original) and a new DT01ACA100V (not sure what difference the 'C' makes).
Using HxD, I can use the .zip files posted to create a new file on either HD, but all eventually fail. At best, I can get to the Format command on screen, which sticks at Format - Percent complete -0%.
After a week of messing around and reading many threads on the subject, I'm wondering if the code is unique to the model or type of Panasonic HD recorder.
Having looked at the HEX code in the bin files already posted using HxD, I can see there are sectors after 40000 that contain what may be 'unique' bits of code, repeated in other sectors.
If anyone has a suitable bin file for a working BWT-850EB, I would like to try loading just see what happens....