When I turn on the tv i only get a blue screen with a dot in the middle, sound works no picture, no menus or anything show up.

Take it back to the store if it is under warranty.

Tv is working, check all input connections.

is there anything buy that has a magnet in it it demanatising screen move it away from screen or put on shelf were it not touching tv.

Have you gone through your TV's menus? You may have to change screen resolution from within the TV's settings to get a full screen presentation.

check focus ic

its sounds like the guns has burnt your yube, when switching of does your tv show a bright circle in the middel, or while watching. Smack your tv on the side while on see if the picture goes away or make a bright circle in the middel, this is caused by a bad solder joint but you wont get rid of the bunt pixels sorry.

Are you using an hdmi cord or av cables?

Sounds like a deflection problem you will need to troubleshoot the deflection circuit.

you have no deflection and don't leave the dot on to long it will burn the crt's.

My panasonic Tv pic suddenly turned into a blue color I can't see the pic any more just can hear the audio.....any solutions????