lost channel 5

hi can anyone help. i have 2nof these mars boxes. the first and new version and both have lost channel 5 it says unknown program and screen stays black i did the the channel update threw sd clean and still the same thx in addvance

hi idone a blind scan is that same thing channel5 still black screen thx

do i edit what i have its 10714mhz 22000ks/s h thx in advance

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thx guys got it goin there was a few of channel 5s and one of them worked