Last month the area where I live and work was hit by some really heavy lightning. Three 55" TVs (at 3 different locations in my city) were knocked out via failure of either the TVs HDMI port used by the cable TV box from Cox or both. Replacing the cable box (and HDMI cable) and changing the HDMI input port on the TV fixed the problem.
The best solution I cold find was the CyberPower CSHT706TCG surge suppressor.
Several weeks later I was able to talk to a Cox installer and said that routing the Cox signal through a surge suppressor will sometimes cause significant distortion. The most interesting thing is he flat out would not offer any way to keep a surge from the cable signal from burning up the TV. I say use a good suppressor and hope for the best. So far the TVs using the CyberPower CSHT706TCG suppressor have experienced no distortion.