On one of several TV's in my home I'm getting a fuzzy signal which is worse on the lower channels. If I shake the cable at where it goes into the VCR/DVD player from the wall the signal improves instantly for a period of time and then slowly gets worse again. Again this only happens on this one TV. I've switched VCR/DVD players along with cables but have gotten the same result on this TV. With the same units/calbes etc it's fine on other TV's in the house... Any thoughts on where the issue may be? Any thoughts or help is much appreciated...