Tried that and failed, says no update data found
This was the exact file (Renamed of course and in the PS3/UPDATE FOLDER) REBUG_CRC[d597208c]_FW[v3.55.4_RE_-_'999'_DOWNGRADER
nope that's the other issue no XMB.
I tried with my origional HDD and that failed. So I put a newly formated hdd in and same exact screen connect controller 999...
Have drive plugged in. I get no applicable update data found when using the downgrader file. I get the same with ofw in there. With 4.82 and 4.86 CFW I get corrupted data error. Bout ready to think this ps3 is toast lol.
In case the drive plugged in isn't functioning properly, have you tried any of the NoBD Firmware such as Ferrox or Overflow to see if it gives the same result?