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thx for your answers. I tried to flash to BU40N 1.03-MK but didnt work. I always got "failure #5". I tried all the FWs from your list. the only one that worked was the asus fw. thats why i tried this way. unfortunately i fail! I am not sure that I will manage recovery with dos flash. I wou...

i crossflashed a LG BU40N (slimline, internal) to ASUS BW-16D1HT. Worked with no other FW. Tried then to downgrade to LG 1.0 FW but was not possible.
I can see the device in the MKV screen with the ASUS FW, but the device doesnt work.

Any ideas?