Please do me a full screenshot of the JapharFlasher when you try to flash the DM800HD box, and don't use any "tool", just run it and do the screenshot of all the JapharFlasher window when it stays/freezes so I can see all details at that point.

TS
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DM8000, DM800se, DM500HD, DM800HD, DM7025, DM7020s, DM7000, DM500s
VU+ Solo, VU+ Uno, VU+ Duo, Kathrein UFS910
Tivusat, TNTSat, Fransat, SSR/TSR, BBC1-2-3/ITV
DE-OpenBlackHole 1.4 image : http://www.openblackhole.com/