When watching tv, the picture cuts off and on, going to blue screen and back to the picture. It acts like it's a fine tuning problem, and it works fine until it gets warm. After watching for 15 or 20 minutes, it starts doing this. Any ideas before I bring it in to the repair shop? Thanks
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The symptom you are describing could be one or two things, if it works for a while then starts to act up this coulb be an indication of a bad solder joint. But it may also be the CRT or the picture tube. Try tapping on the sides when it starts to act up while watching the picture to see if it clears when its tapped on. If it does then you have cold solder joints on the main board, this is a easy fix. IF it does'nt then I suggest you contact your store for warranty info to have the CRT replaced or the television exchanged. Since its still under warranty you might as well use it before it expires...
These procedures are from the owners manual, go into menu and then picture quality and then:
The Convergence feature lets you adjust the TV’s three tubes. When the TV tubes’
images are precisely aligned, they create the color images you see on the screen.
Over time, the picture can drift out of alignment (this is normal). If your picture
seems fuzzy or has a yellow tint, using Convergence could correct this
misalignment. Only one convergence is needed for all inputs, regardless of the
Note: Make sure the TV has been on for at least 30 minutes (TV needs to
warm up for best results) before starting Auto Converge or Red/Blue
When you select the Convergence feature, a submenu appears with three options:
Auto Converge Automatically aligns the projection lenses to self-correct
color images. You’ll see flashing squares of color dance across the screen
(this is normal).
Note: After performing auto convergence, use the Blue Centering and
Red Centering menus to fine tune convergence in the center of the
screen, if necessary.
Blue Centering Aligns the blue and green images to fine-tune the picture.
Red Centering Aligns the red and green images to fine-tune the picture.
Note: The ability to change channels is disabled when adjusting the
convergence options. The TV must be tuned to a usable signal to
converge the picture.
Did you change the resistor by yourself? I am not sure if your TV has manual adjust on the back of the TV that you can adjust. Some times turning the TV Off and unplug it from the wall helps because it resets the TV. Check your Back ground color and see what is the dominating color. Blue, Green or Red. If this doesn't work please call a professional to look at it.
Sounds like you have a problem with the blue gun in your picture tube or its drive circuit.
You might remove the back cover and gently tap on the neck of the picture tube using a plastic
screwdriver handle while watching the screen in a mirrow. If the picture flashes back on or on and off then the picture tube is the problem.
If this is a projection tv you have three separate tubes : red, green & blue.
you'd need to tap the blut one.Gently!!!!
As long as you can hook that same cable up to a different TV and get a good picture, you must have somehow damaged the tuner on the APEX - unless the set was mishandled while moving. Those cheaper brands won't take much punishment.