I`ve exactly the same problem with my H8000FW, did you find a solution or a way to reimport the presets?

I first had an E12 error, then changed the battery and did a factory reset (holding down 8 during startup) with no success.

Then I performed the self test (holding down 5, test all) which may have been the main mistake and probably have erased the factory presets.

Then I removed and cleaned all socketed ICs, including U106 which showed reaction during wiggling (contacts were quite oxidized). I now know I should have done this first…

Finally I successfully installed firmware 5.61 but now got the message “faulty presets code installed, contact factory”.

Thanks!