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Check your settings, you might just need to track and reinstall all channels again...sometimes caused by bad weather/showing
( no signal ) or you can see your manual trouble shooting guide.
Hope this tip helps.
If your LCD TV or monitor has stopped working, or is displaying one of the following symptoms, then it's a candidate for some new capacitors
- Flickering screen
- Screen image disappears after several seconds
- Dim screen
- Slow start
- Power LED on, but no picture
- Unusual colors and/or lines
The primary cause of LCD TV and monitor failure is caused by faulty capacitors. You can examine the capacitors in your LCD TV or monitor and actually see if they are bad.
If they appear bulged on top, then they need to be replaced.
New capacitors will solve a host of problems in LCD monitors and TV's and will extend the life of your monitor or TV by several years.
Check the cables, connectors and connections.
Take it to a repair shop.
you need to adjust the convergence. you set up convergence 1 then 2. follow the manual. (Its easy, you just align the + signs so they make one white one (instead of three green, red, blue) sounds like something or someone bumped the tv, causing the blue lens to shift a little.
The problem can be caused by a bad sustain board (Ysus Zsus) , the popping sound is often caused by a capacitor blowing up. The TV must be taken apart and tested before eventually replacing sustain boards.
I've been finding quite a few HDMI related problems over the past year and it seems to be increasing.
The problem usually is due to the cable being somewhat heavy. The plug sticks straight in and hangs. The weight of the cable uses the downward momentum and starts ripping the solder connections from the televisions HDMI input.
When the audio becomes distorted, try moving the cable and see if it clears up. If it does, then, that's the problem. If not, then the problem is more than likely the audio circuit.
Either way the Main PCB needs to be replaced.
After replacing the Main board, I suggest using component inputs instead (Same quality picture, just more cords), because, the chances of another problem caused by HDMI is likely.
Hope this helps.