The video 4 inputs are not working. I am trying to remove the cover to access them. There are slots to pry, but seems extremely difficult. I do not want to break it. And I missing something, such as a sett screw.
You have to remove the entire rear case to access the video input(s) panel. There are quite a few screws. Be careful when removing the case because there is an internal wire connected from the inside back of enclosure to the main power board.
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You will need to remove the back of the TV. Don't worry, it's not that bad.
There are 4 screws across the top, one on each side on the bottom toward the front, one right next to
where the power cord goes into the back of the case, and the two more
by all of the video connections **These are the most important to
remove because they attach the main board to the back of the case.
Once you have remove the screws then the entire back of the set will
slide off. If you look where the power cord attaches to the board you
will see a small fuse. This is a 6.3 Amp 125 volt fuse. You can replace
it with a 6.3 Amp 250 volt fuse from your local Radio Shack. A four
pack costs between $3 and $5.
Make sure that you check that it works before putting it all back
together. Check for any loose connection cables while you're back
there. I found a few when I did this.
The platic "lug nut" covers have to be removed to access three screws on each wheel. They are hard to get off without breaking them. If you look carfully you well see that is a tab on two sides of each "nut". They have to be compressed to release. After breaking two, I found that a narrow xacto blade can be pushed into the tab slot on one side. A put pressure on the blade so that the tip forces the tab toward center of the nut. A slight twist should pop on side free. The other side will come free easier. There are five on each side. Only the front and the two in rear have screw behind them. Once you remove the "nuts", and the wheel, the other screws are obvious. Two under each wheel. Two at the top of the cover and two on the video input board.
If you are saying the tuner input (coax) on
the back of your tv does not work,but the video
inputs do==then I suggest you use the yellow,
red and white output of the Charter box into
a video input on the tv. This kind of hook-up I call a tuner by-pass.It is an excellant diagnostic tool used on field service calls.
Hope it helps.
On a Panasonic to do a factory reset while the set is on press in on the power and action buttons on the front of the TV at the same time. In a few seconds the screen shouls go blank and come up with a screen that says "CHK" in the upper left hand corner. Once it does that press the action button again to clear the screen. You have now reset the TV to factory settings and will have to re-program the channel memory once again. Hope that works...