I have a Philips flatscreen HD TV model 32PF7320A/37B. connected to Comcast cable. I fell asleep with it on the other night & we had a lightning storm during the night (don't know if this caused the problem). When I woke up the TV was no longer connecting to HDMI, though I have re-set it through settings to HDMI 1 (cable). When I turn the set on, the cable box comes on appropriately, but the banner at the top of the screen does not say HDMI and tells me the channel is not found. What am I doing wrong? HELP!