I have a Samsung QN82Q70RAFXZA. It was left on all night and when I woke up, it would only start for 2-3 seconds then cut off. I could hear volume in background but never had time to see the actual screen since it turned off. I took it off the wall, took off the back and diagnosed. I checked the backlights by unplugging the power board and they worked but from then on I only got a blue screen when turning on. I replaced the mainboard but no change. I have unplugged the two ribbons to the lower panels (not sure what they are called) to see if I might use the tape method to fix but no change. I am wondering if the driver board needs replacing? Any help is appreciated. oldturkey03...thoughts?
=== Update (03/12/24) ===
Sorry for the delay. I get no Samsung logo or anything else when I turn on. Note this TV is in garage and only has power cord so no other source inputs using cable or HDMI. I unplugged power, then unplugged the cable between mainboard and PB (at the PB terminal), then plugged power and that is the pic I uploaded. I circled two of the holes showing backlight is lit. The other two pics aren't great but you should get the idea of what the blue screen looks like. I assume that is simply the backlight showing through but nothing more?
[image|3251966]
[image|3251967]
[image|3251968]
=== Update (03/14/24) ===
Here is pic and I read the pins on the right side
[image|3253604]
=== Atualizar (03/17/24) ===
I am not sure if I did this correctly but here are two pics. Both from the third row which is POwer On. Bottom is the 4.55 and top is the 13.
I have a Samsung QN82Q70RAFXZA. It was left on all night and when I woke up, it would only start for 2-3 seconds then cut off. I could hear volume in background but never had time to see the actual screen since it turned off. I took it off the wall, took off the back and diagnosed. I checked the backlights by unplugging the power board and they worked but from then on I only got a blue screen when turning on. I replaced the mainboard but no change. I have unplugged the two ribbons to the lower panels (not sure what they are called) to see if I might use the tape method to fix but no change. I am wondering if the driver board needs replacing? Any help is appreciated. oldturkey03...thoughts?
=== Update (03/12/24) ===
Sorry for the delay. I get no Samsung logo or anything else when I turn on. Note this TV is in garage and only has power cord so no other source inputs using cable or HDMI. I unplugged power, then unplugged the cable between mainboard and PB (at the PB terminal), then plugged power and that is the pic I uploaded. I circled two of the holes showing backlight is lit. The other two pics aren't great but you should get the idea of what the blue screen looks like. I assume that is simply the backlight showing through but nothing more?
[image|3251966]
[image|3251967]
[image|3251968]
=== Update (03/14/24) ===
Here is pic and I read the pins on the right side
[image|3253604]
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=== Atualizar (03/17/24) ===
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I am not sure if I did this correctly but here are two pics. Both from the third row which is POwer On. Bottom is the 4.55 and top is the 13.
I have a Samsung QN82Q70RAFXZA. It was left on all night and when I woke up, it would only start for 2-3 seconds then cut off. I could hear volume in background but never had time to see the actual screen since it turned off. I took it off the wall, took off the back and diagnosed. I checked the backlights by unplugging the power board and they worked but from then on I only got a blue screen when turning on. I replaced the mainboard but no change. I have unplugged the two ribbons to the lower panels (not sure what they are called) to see if I might use the tape method to fix but no change. I am wondering if the driver board needs replacing? Any help is appreciated. oldturkey03...thoughts?
=== Update (03/12/24) ===
Sorry for the delay. I get no Samsung logo or anything else when I turn on. Note this TV is in garage and only has power cord so no other source inputs using cable or HDMI. I unplugged power, then unplugged the cable between mainboard and PB (at the PB terminal), then plugged power and that is the pic I uploaded. I circled two of the holes showing backlight is lit. The other two pics aren't great but you should get the idea of what the blue screen looks like. I assume that is simply the backlight showing through but nothing more?
I have a Samsung QN82Q70RAFXZA. It was left on all night and when I woke up, it would only start for 2-3 seconds then cut off. I could hear volume in background but never had time to see the actual screen since it turned off. I took it off the wall, took off the back and diagnosed. I checked the backlights by unplugging the power board and they worked but from then on I only got a blue screen when turning on. I replaced the mainboard but no change. I have unplugged the two ribbons to the lower panels (not sure what they are called) to see if I might use the tape method to fix but no change. I am wondering if the driver board needs replacing? Any help is appreciated. oldturkey03...thoughts?
+
+
=== Update (03/12/24) ===
+
+
Sorry for the delay. I get no Samsung logo or anything else when I turn on. Note this TV is in garage and only has power cord so no other source inputs using cable or HDMI. I unplugged power, then unplugged the cable between mainboard and PB (at the PB terminal), then plugged power and that is the pic I uploaded. I circled two of the holes showing backlight is lit. The other two pics aren't great but you should get the idea of what the blue screen looks like. I assume that is simply the backlight showing through but nothing more?
I have a Samsung QN82Q70RAFXZA. It was left on all night and when I woke up, it would only start for 2-3 seconds then cut off. I could hear volume in background but never had time to see the actual screen since it turned off. I took it off the wall, took off the back and diagnosed. I checked the backlights by unplugging the power board and they worked but from then on I only got a blue screen when turning on. I replaced the mainboard but no change. I have unplugged the two ribbons to the lower panels (not sure what they are called) to see if I might use the tape method to fix but no change. I am wondering if the driver board needs replacing? Any help is appreciated. oldturkey03...thoughts?