Question about Proscan PLCD5092A 50 in. LCD HDTV

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Problem with Proscan PLCD5092A-B I replaced the main board with no luck :

Can anyone help me plz ty !!! !!! I have stand by light on red normal !! When i turn the tv on it stays on blue light!!! I get a clear picture but when i try to turn off the tv it will not turn off !! I have to unplug the tv .. then when i plug it back it goes to red wich is normal .. then turn it on it goes to blue no picture again or shut off !!!

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Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/ In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.
Before going further; try a hard reset first. If it does not help you, replace the main digital board. There are two methods to reset TVs. The first is simple to do; a Hard Reset. The other is somewhat skilled; is a Factory Reset (System Reset). To make it a hard reset, just unplug the TV from AC mains wall socket, and re-plug it back after 15 minutes or so. If you do this by overnight is better. This procedure will make it a hard reset. If you want to make it a system reset [Factory Reset]; you have to enter its service mode option, and select the factory reset option. If you wish to get some details; visit the site linked here.

Posted on Dec 31, 2016

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Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.

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