SOURCE: Blue/black vertical line in the middle of screen
Sounds like a bad connection on a ribbon cable or plug comming or going to the LCD display. This is something you should not try to fix as these circuits are very very fradgile and you can easily break or tear a ribbon cable . Call the manufacturer to get a tech to assit you. Good Luck
SOURCE: Picture Size problem with Samsung Flat panel LN-T3253H
You should contact Samsung service to know if the internal setup for the picture sizing was not adjusted properly at the factory.
Take care that some of these sets have a user zoom mode. Maybe it is in the zoom mode. Check in your instruction manual before calling for service support.
Jerry G.
SOURCE: Aspect
I have this same problem with my hitachi 55 inch ultravision luckily i have a warrenty still in effect so i called them and they said... Analog channels are not formatted for wide screen aspect (4, 6, and 10 ect.) this is a normal thing don't worry. It automatically returns to 4:3 because analog is full screen only, and it will return to 16:9 otherwise or whatever you have it set to. Nothing you can do but the good news is your TV isn't broken!
SOURCE: Squealing when not watching HD channel
replace or Resolder LL0377 then Glue it with gule from Glue gun.
SOURCE: Sometimes Loses Sound
disconnect the hdmi cable from both ends it resets the sound signal!!!
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