Phillips magnavox

Model#7P6033 W101

Chassis # PTV775-AH01

SN# 83386596

Manufactor Date:1998

My kids were watching the tv and it just went black.It still has sound but no picture.I can even change channels.

When I turn it off i goes off and when i unplugged it for the wall i still here some type of power shutting off.I recently changed the coolant and got nothing on the boards.Its been running great for about 6 months.However We have had a lot of thunder and lightning storms in texas lately ?????. PLease help PEE WEE????..... Thanks