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No,this thing come in as a whole tv unit,dosen't come aparts.U check the tv,see if it work,before going all the troubles moving it to another room.These DLP tvs design are notorious for it tv convergence problems and DM power supply board intermittently shutdowns alots.It bulky design and not work for free DTV over the air.
You have your TV in the "Teletext" mode. Go into the TV menu and select the closed-captioning menu and turn off the text function. What you are seeing is the result of the TV's captioning circuit latching onto a false text pilot signal and then throwing up the black box on the screen.
Go into the TVs menu and look for the closed captioning menu. Someone has inadvertantly selected the "teletext" mode. Since no broadcaster s currently using this feature, when a false signal is encountered by the TV, it throws up the black box that would contain the text data. Turn off the text function and enjoy more of the picture!
If you take the cables that are currently connected to video 1 and connect them instead to video 2, select video 2 as the input from the remote and get the no-signal message, there is a problem with either the switching IC (not likely) or the input jacks (more likely). The problem with the input jack may be as simple as a bad solder connection that can be fixed in 5 minutes. Do the test first. If you get no signal, request service. This should be a simple repair.
If the dots are very narrow and jump about and you're receiving an analogue signal it could be teletext information. This is normal but is usually hidden off the top of the screen. You need to adjust the picture height to take them off the top.