What's amiss with my Insignia 50" Plasma TV NS-PDP50HD-09

!: What's amiss with my Insignia 50" Plasma TV NS-PDP50HD-09

Recently, my plasma tv started displaying weird behavior, with the right half of the screen jiggling up and down and flickering, but it only happens on HDMI input. Multiple inputs, multiple cables, multiple sources, the problem still occurs. It happens at random and I can't figure out how to reproduce it reliably. It seems to go away by itself. Any ideas? And any comments that soley exist to ridicule my choice of brands will be reported as spam and removed. I'm trying to troubleshoot a problem, not lament on how I could have spent half a grand more when I decided to purchase a TV a year ago.

What's amiss with my Insignia 50" Plasma TV NS-PDP50HD-09

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