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Pixels in the evening

Frequent Visitor

Pixels in the evening

I get major pixel issues in the evenings.  It will begin around 5pm and gradually get worse until the screen goes black with a "one moment please" message.  Everything will be fine again around 9am.  It only happens on the broadcast channels (CW, CBS, NBC, etc.).  I have had two tech visits.  The first changed the box and the end of all cables in the house -- no effect.  The second made changes to all connections outside the house -- no effect.  I do not know which of my neighbors have comcast service, of I would go around asking if anyone else is having trouble.  It looks as if I will not be able to watch this year's Superbowl.

 

Browsing through forums, if seems that the primary fix for a problem like this is to have a 'line crew' come out.  How does one get that done?  Are there any other suggestions?  Thank you.