Panasonic VCR is really noisy in Pause mode
 

One third of the picture is noisy when paused. Its always on the top
half. Slow motion shows a slight amount of noise. Normal Play is OK.
The problem still shows up on store bought pre recorded tapes, but to a
lesser degree.

Also, the audio takes 15 seconds to clear up on SLP tapes.

Thanks for any ideas on how to remedy this.

The machine is a Panasonic PV-4456.