Our tv turns itself on and off continously until we unplug it from the the power source. we tried to connect direct to wall then to power strip/surge protector and it still happens. some days we can watch it all day and other days its on for about 15 to 20 minutes and it starts acting up. HELP!!!
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Re: 42" lg plasma tv
The first thing is to take out the batteries from the remote when the problem acts up. If this fixes it, replace the remote. If not, go to the front of the tv and find all the buttons that are on the tv. Start by pushing all of the buttons one at a time. They should all feel the same and sound the same when you push them. If one of them does not, then the buttons are the problem. If they are good, take to a repair shop. The main control board is bad.
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Make sure that the wall plug it's working, if it is, then use the power botton on the tv, to reset the tv, if you can hear any sound from a channel and no video, then might be an internal short, you will need a technician to trouble shoot this problem.
Most likely the TV has a power supply related problem. The most common thing to go out is the circuit board that supply power to the screen. Commonly called a Backlight Inverter Board. I can't say it's 100% the problem because I can't actually look at the tv over the internet. If by chance the TV is still under warranty, go that route. If not under warranty and If you have some electronic experience, you can purchase a Service Manual over the internet and diagnose the source of the problem and fix it by soldering in the new part. The Service Manual will give you circuit diagrams, test points, and part# lists. Usually, cost under $20.
Try a power drain and if this doesn't work, it appears the power supply is defective or is not connected to the mainboard. If the connection was poor, simply moving it may have dislodged it and service would be required to reconnect it. Try the power drain first:
1. Unplug the product's power cable so that the device is not grounded to the house. Do not simply turn off the power-bar if one is in use. 2. Press and hold in the products power button for 1 minute to release the retained electricity from the capacitors and circuit board.
3. Plug the product back into the wall outlet rather than a power-bar to rule it out of contributing to the problem and turn the device back on.
Hope this works for you.
Found that TV started switching off by itself. Would try to come on..green light blinked for 2-3 seconds, tv came on (with picture and sound) for 1 or 2 seconds and then it would turn itself off. Found that the issue is with one channel only. If you are facing this issue....try quickly changing the channel the moment it comes on. You can do it either with remote or with the TV buttons directly. also in the same logic, if this is still happening, try changing the source to another (rgb-pc, av1, av2 etc). Basically change it from whatever input it is on currently, if changing the channels does not work. My symptom was that the tv made a loud 'TIK' 'TAK' sound which is louder than normal.