Turn on the TV. If the TV doesn't turn on, if you feel a wetness around the crack in the screen or if the picture isn't coming in properly, do not attempt to fix the TV yourself. Take it to a professional.
Turn the screen off and unplug the TV if the TV appears to be in working order except for the crack.
Apply a thick coat of petroleum jelly to the crack. Rub it in slowly and thoroughly with a clean eyeglasses cloth.
Reapply the petroleum jelly and rub off again, if necessary.
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These pasted instructions came from eHow.
How to Fix a Cracked Plasma TV Screen
Turn on the TV. If the TV doesn't turn on, if you feel a wetness around the crack in the screen or if the picture isn't coming in properly, do not attempt to fix the TV yourself. Take it to a professional.
Turn the screen off and unplug the TV if the TV appears to be in working order except for the crack.
Apply a thick coat of petroleum jelly to the crack. Rub it in slowly and thoroughly with a clean eyeglasses cloth.
Reapply the petroleum jelly and rub off again, if necessary.
Nope u can't fix it...buy a new one