After a bad storm knocked the power out, two of my four TV's have red & green in the corners and it isnt going away! As a temporary fix, I taped magnets in all four corners and the picture is fine. What could the problem be? Is there a more permanent fix??
(One TV is the Toshiba & the other is a Sharp - dont know the model #)
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The remaining red retrace are the giveaway that this is most likely not a CRT problem.
(If there were no red lines, it could be the filament for the red gun of the CRT going on and off due to a bad connection inside the CRT - bad news.)
How is a black and white picture? (Turn down the color control).
If B/W picture is good, then the problem is somewhere back in the chroma decoder circuitry.
Check the video input to the CRT video driver board and signals on that board. If B/W picture is also bad, then you can compare red and green signals to determine where they are becoming different. The red lines in your description sounds like the red video output circuit is drifting and messing up the background level, blanking, screen, or other setting. Could be a capacitor or other component. Hope this will help...
Ur tv convergence is dead.Must know how to solders?Buy a convergence kit at Tv Repair World.com,Tvrepairkits.com to replaced the convergence ICS and all it resistors.The shop will cost u $300 parts and labors.
It sounds like your color processor may have gone bad or at least the circuitry connected to it. To solve this problem you will need a schematic, a digital storage oscilloscope, a signal generator, and a multimeter. Now if you don't know what these devices are and do not have a background in electronics, I would suggest that you take the TV set to a qualified TV repair person. I am not trying to put you down or anything its just that this problem requires that you open up the set and using the schematic trace down the signals that control the LCD screen and find out the condition of the signals that display green. Since green is the result of the algebraic addition of red and blue, you may have a problem in the circuitry that controls that function.
yes! the problem is in the CRT board the RGB colors! you have lost of blue and red! thats why your unit is green! and only green is worked the blue and red is not work! maybe you have lost contact of them! resolder all CRT board to comeback the normal picture!
Before taking the set to the dump, try to unplug overnight, not just a breif time. If that doesnt help you are going to need to have it serviced or replacement is most likly the outcome ,because of the proice its going to cost.