One more time, please read the prior posts and do EXCATLY what is said
and post the results.

What happens when the vcr is connected to the Video input (not cable
tuner input) on the tv set and you tune those same channels?

What happens when you disconnect everything except for the cable line
and send it directly to the tv set?

If it is a cable company provided cable internet box, it could be
causing the problem.

What metal thing are you talking about coming off? Sounds like you
have at least one bad cable connection that needs replaced.