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I have the exact same problem with my BU40N. It suddenly happend after approx. 40 - 50 backup. My computer was off for a couple of days and the drive disconnected. Yesterday I was going to do some other backup and now it won't work as there is "No disc" Have tried everything, reflashing, chance ...

Excellent - TY.

Forgive me for asking but why is it recommended not to stay with 1.04MK?

However I will follow your advice MartyMcNuts, and flash to DE 1.00. Just to be sure so I won't brick my drive. Please confirm that I can flash from 1.04MK to DE 1.00 using SDFtool flasher and when I do that ...

Do I need o do anything or is the job done?

I've just flashed my BU40N with the newest MK firmware BIN file from the BU40N-N-Main folder. Everything went fine and it said 100% succes. Aftwerwards I checked with MakeMKV and saw iI was still on firmware 1.04.....

OS drevnavn: K:
Producent: HL-DT-ST ...