Just looking at that picture, you have a lot of pixelation. It is a signal issue. Either splitter, cable, or signal into the house. You will have to check the signal levels on the modem page for a rough guide. Have a look at pabloescaban's recent posts, he has mentioned what the range fro signal values should be.
For 40967, ABM tunes to
frequency="595000"
symbol_rate="6952000"
modulation="5" (QAM256)
If yo check all the cable tuners in signal finder,'m sure you wont be able to lock onto that frequency.