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Cause of screen burn typically is pixels are no longer showing full range of color. Typically a shop would cycle screens or blocks of very bright colors alternating colors to unstick any pixels not showing full range of some color. Setting tv back to factory default then adjusting could help also turning up brightness. Change color settings from cool to warm could help. Could also be a refresh rate. Verify tv is set to display at same rate as input device like cable box set to output 1080i while tv native is 720p. Just because there is a pic doesn't mean they are synced.if tv has to convert signal from 1080i to 540i then resize to fit 720p tv it may slow refresh rate tv is trying to display progressive scan image but not enough data is coming in so it redisplays previous image on every other line.and new data on every other line.
solution is check output video settings of source to match native resolution of tv. Hd cable box this is common as tech sets output to high resolution 1080i most inexpensive tv are 720p
Theres a good chance that you have a power settings problem.
goto:
control panel / power options / power schemes
and make sure you dont have quick time out for ac or battery.
even it if looks right, change both. and reboot see if helps
sounds like your "brightness" button may be stuck. try pushing it and see if it feels the same as the other buttons (should feel it "click" a bit). Also see if any of the other buttons work, because if it IS stuck, they probably won't work...
I don't know for sure if this will help but it's worth a try. Go to Start, control pannel, system, advanced, performance, settings, and click adjust for best performance. This is a Windows XP fix but the same thing may apply to older OS's (95, 98, 2000, ME, NT (although you may have to set it a diferent way). Many other things could be your problem but this is an easy thing to try.
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