Ok guys I am at my wits end. Got a Sanyo DP-55441-01 from a good friend that was not working due to lightning. When I first got it it did nothing...I had 5 volts standby...changed out the mainboard and got backlights and screen is on but I have no menu,volume etc.... I ordered another tcon board and changed it...same results. next I changed the Power Supply no change. I also unplugged the master and slave backlight boards and get the same results as below. The set also turns on with a green powerlight and after 10 seconds the green power light starts flashing red/green really fast. Set never turns off. I still get no menu, volume etc. How do I check for a bad LCD screen?
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