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Carole, could you please get me the complete model number written on back cover of TV?
How did you confirm it is backlight failure in TV?
If screen glows then it is not backlight failure.
Does TV won menu graphics appear when push menu button?
OK, have you tried to unplug TV power cord from wall outlet for 10 minutes to reset, replug back in and check?
Sure, take your time.
OK, does the screen glow/ show light inside when switch On TV power?
Thanks for the info. "Shone a light on the blank screen. Saw green wavy lines," is very important info that indicates it is not backlight system failure, its rather main board internal failure that controls the backlight system and process video signal/ data for screen to make an image/ picture.
It needs to swap main board of TV to fix the problem, since TV is small TV so you would be better off with a new TV instead of spending time and money on this old one's repair because new 32 inch TV would be available in less amount as the prices has gone low. I hope these info will help. If you have any additional questions, feel free to ask. If you're satisfied, please rate me a 5-star at the top of your page so I can get credit of my work on website.Thank you.