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Re: picture too big
You mean too big from side too side or top to bottom?? if its all the way around is there a zoom button on the remote??? if ita too big from top to bottom a part might have changed value in the vert sweep curcuit. You could very carefully take off the back and find a small pot or control in the vert cuircut and bring down the picture But I dont recomend this if you have no knowlege of tv curcuitry.
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This link might help: https://www.google.com/search?q=toshiba+19dv615db+tv+manual&ei=L6xhYJiKG4nd9QPz9I6gBA&oq=toshiba+19dv615db+tv+manual&gs_lcp=Cgdnd3Mtd2l6EAM6BwgAELADEB46BggAEBYQHjoICCEQFhAdEB5Q9yxYmTxgiz9oAXAAeACAAbIBiAGmB5IBAzIuNpgBAKABAaoBB2d3cy13aXrIAQHAAQE&sclient=gws-wiz&ved=0ahUKEwjY3dvspdXvAhWJbn0KHXO6A0QQ4dUDCA0&uact=5
When the picture is too large there are three possible solutions at least.
Starting with the simplest two: There are buttons on the remote controls (cable/satellite and television) that control the picture size. On the cable remote it is usually on the bottom, and it says hd zoom. Press it and it will size the picture down for you. On the television or satellite remote it might say view mode, picture mode, format or aspect.
Now, the more difficult solution if the above doesn't work: The settings might not be right in the cable box/set top box. If the television is a 720p television, make sure the cable box/set top box is set for 720p and not 1080i even though they're the same (yes, yes I know). Also make sure you are not connecting a cable/set top box to the coaxial rf input when you have the capability to connect to a component or hdmi cable. I hope this helps.
Generally, LCD tvs don't do well with "standard" signals, since they're designed for HD.
You may get a slightly better picture by replacing the cable that connects from your TV to cable box, and cable box to wall. However, if you're not watching HD, it's unlikely that you'll notice the better cable making a big difference.
It means the fluid that cools each picture tube is low in the green but where did the fluid go,remove the back cover and check for a fluid leak towards the front side of the chassis and if any it should be right below one of the picture tubes.The description of your problem tell us you have a rear projection set but the heading shows a direct view tv.??????????
Since it was move the leak is only a possibility there could be other reason.Be careful and be sure set is unplug.