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If you want to trouble shoot this issue. you need to take it apart and look for signs of bad parts. If you dont then you need to take it apart and replace the power supply board. What is the make and model?
Take it apart and wipe everything clean....I spilled soda on my remote and the same thing happened sometimes I'd push one button and I'd turn off the TV or go to the meny when I wanted to chabge the channel... A couple of screws and it will come right apart
It will not let you change channels until the signal locks on. If it just keeps searching for the signal, look for a reset button on the dvr. If not, pull the power for 20 seconds to reset the dvr. IF it still wont find a signal, there is a major problem and you should call your satellite provider.
Had the same issue. The biggest task was figuring out how to take the TV apart. Two screws at the top, three each on the tires which I gently pried off with a flat screwdriver using the center of the wheel to pry from, two screws that were hidden under the tires and the two screws at the video plugs at the back. Next remove the circuit board by removing the 4 screws. BE EXTREMELY CAREFUL AS HIGH VOLTAGE IS STILL PRESENT WITHOUT BEING PLUGGED IN!. If you do this carefully you wont have to unplug all the plugs. If you do have to remove them mark each one with a colored marker marking the board and the plug. This helps when you have to plug everything back in. Now looking under the back of the board the tall black high Voltage transformer that has the red wire going to the TV tube has really poor solder connections. I found three cracked. I re-soldered all ten of the pins. Plugged everything back in and now it works.
yes that wire which got loose needs resoldered [properly and main board fuse needs to be checked.if not familiar with checking the board with a meter then just call a service repair person as the cost of soldering will be very negligible.
just be basic....dvd is ouput goto tv input...watch the color yellow to yellow ,red to red etc, got tv ,look for audio output to anything input to home theatter etc.if u hook in to aux set home theater to aux etc,
input to output and output to input ok? hope i help u..