This is probably a bad flashing, if you get this generally it's because the image is corrupted.

Try to flash the image with DreamUp or WebIf (Telnet) but with the Bad Sectory Recovery enabled.

If it's a backup you done yourself, then change Backup tool as it looks like creating corrupted images.

To Flash use Chrome or Explorer, not Firefox that is not compatible (most of the version). Be sure you press the Frontpanel UP Arrow to activate the upload/WebIf.

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/