Signal at 0%

i have a Zgemma h2h with IPab, was about to reflash with grogbuild. I pulled the box out and it switched off, when it came back on the signal had dropped to 0% and I’m getting no channels at all. Tried a scan and getting nothing. Any of you guys have any idea what I’ve done?
 
Tried all the cables mate, took one from back Of tivo box. Rebooted it about 5 or 6 times.

It’s just started again on its own. Cheers
 
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