This model is the one with the one connect or whatever.
Problem. Supposed lightning strike, who knows. Turn on TV, backlight comes on, then goes slightly dim and no picture. No error code, backlight is on. On the very bottom there is a small white line about 3 inches long 1 sm tall, one for each side of screen both evenly. This goes away when disconnecting panel ribbons.
Power supply. Gives 13v across all pins correctly, gives correct LED voltage to backlight when disconnected from main. PWM 1-13 (or whatever it is) all give 3.3 v all disconnected.
Plug in 13v to main, all voltages stay same and pwm is 3.3 still.
Plug in second connector to main, all voltages drop from 3.3 (on PWM) down to like .5, .6, .5, .6 etc. None are 3v. They are steady. The 13v side stays 13 v.
Similar test with all ribbons to panel disconnected 1 side at a time etc.
PWM always drops. As a note, backlight stays bright when ribbons connected to main/panel and 13v wire connected to main. They only dim when the PWM ribbon is connected.
I'm trying to Google what PWM and research what it is. Any advice? Is this a main board issue then? Can we isolate it to this and would it have anything to do with reflowing main chip.
Thanks ��
Problem. Supposed lightning strike, who knows. Turn on TV, backlight comes on, then goes slightly dim and no picture. No error code, backlight is on. On the very bottom there is a small white line about 3 inches long 1 sm tall, one for each side of screen both evenly. This goes away when disconnecting panel ribbons.
Power supply. Gives 13v across all pins correctly, gives correct LED voltage to backlight when disconnected from main. PWM 1-13 (or whatever it is) all give 3.3 v all disconnected.
Plug in 13v to main, all voltages stay same and pwm is 3.3 still.
Plug in second connector to main, all voltages drop from 3.3 (on PWM) down to like .5, .6, .5, .6 etc. None are 3v. They are steady. The 13v side stays 13 v.
Similar test with all ribbons to panel disconnected 1 side at a time etc.
PWM always drops. As a note, backlight stays bright when ribbons connected to main/panel and 13v wire connected to main. They only dim when the PWM ribbon is connected.
I'm trying to Google what PWM and research what it is. Any advice? Is this a main board issue then? Can we isolate it to this and would it have anything to do with reflowing main chip.
Thanks ��
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