Variable plasma picture quality


I've got my Panasonic plasma hooked up to digital cable. A couple months ago we had a lightening storm and the next day I noticed a grainy quality and lack of sharpness to the HD picture I hadn't noticed before. It seemed to correct itself after a couple days.

Then yesterday I noticed the same thing again, but this time no storm beforehand. My assumption is the cable signal is compromised in some way rather than the TV (at least I hope that's the case), but wondering if anyone else has seen this, what may have caused it, and what you've done about it if anything. I don't have another hi def source to use for comparison.

By the way, I don't have a power conditioner/surge protector hooked up yet but will soon. Thanks for any thoughts/insights.
soix
Check your coax cable to be sure it is at least rg61. If you have old rg59 cable the picture really suffers...
Thanks for the info Winoguy -- I had no idea. How can you tell which you have? Is it labeled somewhere?
Well, this weekend my picture returned to "it's like looking out a window" performance and all seems right with the world. I turned off and rebooted my computer, which runs off the same cable, but I can't say if that did it nor do I know if that should have any effect on my TV's performance. Curious that my computer said other people were signed onto my computer when I was signing off (which is bothersome by itself), so I'm also wondering if that was eroding my cable signal. I'll ask the cable company, but I'll probably get some made-up answer from someone who knows nothing.

Thanks again for all the help, and I'll report back if I ever find the cause in case it might be helpful to others in this situation.

Still would like to hear from any Fios users on their opinions of that service.