Facing TV Problems? Ask a TV Technician.
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Please try following procedure to see if TV turns On?
While holding down the “VOL Down” and “CH Up” keys on the TV set at once, touch the power supply key on the TV set.
Please reply back with the result.
OK, so screen didn't light up, correct?
Flash code 1 long 1 short indicates problem with backlight system and we just tried to bypass the error detection system to see if screen lights up that didn't, it shows backlight inverter section isn't working and power supply board will be replaced in TV to move forward.
I'm sorry there is no easy or quick fix for this problem and it is definitely hardware failure that needs defective board replacement to resolve the issue. I trust my input will help you out to make decision about this TV repair or invest that money on new replacement TV. 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.