gear02

I just bought that refurbished vcr from buy.com and it has a problem recording. I can record something off the TV, but when I play it back it's fine but at regular intervals the picture fizzles out and back in to perfect, then repeats. The sound quality doesn't change, but this picture thing it annoying me. Adjusting the tracking doesn't do anything.

I have my coax cable plugged into the vcr which outputs to the tv through another coax cable.

Can anyone help?