Use the JapharFlasher with RJ45 cable (and Network activated) connected to the Router/Modem, and Mini-USB Cable from box to your computer.

JapharFlasher v1.1 : http://www.ourdreambox.com/ubbthreads.php?ubb=showflat&Number=2012&page=2

Flash the SSL88J.NFI file and your box will be back alive with no more NO CA ERROR.

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/