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Hello, I'm Shahid.Sorry to hear that you're having trouble with this but I'll do my best to help.
1- Could you please get me the model number written on back of TV?2- How old is the TV and how long it have had the problem?
3- Any thing you have tried to fix the problem?
OK, does screen glow/ show backlight when turn On the TV?
I need to go offline for 45 minutes, will reply you when come online again.
OK, have you tried to disconnect TV power cord from power source/ wall socket for 10 minutes to reset, replug back in and check?
Sorry to hear that, unfortunately TV symptoms indicate main processor board failure which isn't booting up fully to turn On the TV and causing the problem. Replacement of main board of TV is needed to fix the problem. Required main board is available at following supplier, please click the link to view the price..
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. Thank you.