Sony KDL60NX720 when turned on had a dark spot on top of the screen, then would turn off and blink red light 4 times
Bad LED strip? That's what I thought. Took apart. It has 4 LED cables plugging into the LED board, I was going to swap two cables to confirm but I could not get the cables off
Then decided to take two led strips off the front and swap the connections at the other end but they do not have connectors, they are ribbon connected
Before I took it apart it would come on a few seconds then turn off, had a dark spot
When I powered it up when first disassembled it showed the same issue but I had the press the power button a few times, each time I did I would see the bottom leds dimly light for a nano second then go off, then the third press of the power button the LEDs came on for a second, except the dark spot, then turned off (the dim area was part of a strip not all of it, I see no brown spots on the LEDs)
Now when I do the same test, the first two times the leds on bottom dim for a nano second, then on the third try ALL (even the dark area) the leds come on for a nano second then turn off. When they all came on except the dark spot they were on a good 2 seconds, now when the ALL fire they last a nano second then turn off.
I have to unplug the power each time to get it to work again.
Is this the LED driver board the 4 leds wires go to or the board below (tcon I believe) that has a ribbon from the LED board going to it, then two ribbons out of the bottom of it to the LED screen?
Thanks
Bad LED strip? That's what I thought. Took apart. It has 4 LED cables plugging into the LED board, I was going to swap two cables to confirm but I could not get the cables off
Then decided to take two led strips off the front and swap the connections at the other end but they do not have connectors, they are ribbon connected
Before I took it apart it would come on a few seconds then turn off, had a dark spot
When I powered it up when first disassembled it showed the same issue but I had the press the power button a few times, each time I did I would see the bottom leds dimly light for a nano second then go off, then the third press of the power button the LEDs came on for a second, except the dark spot, then turned off (the dim area was part of a strip not all of it, I see no brown spots on the LEDs)
Now when I do the same test, the first two times the leds on bottom dim for a nano second, then on the third try ALL (even the dark area) the leds come on for a nano second then turn off. When they all came on except the dark spot they were on a good 2 seconds, now when the ALL fire they last a nano second then turn off.
I have to unplug the power each time to get it to work again.
Is this the LED driver board the 4 leds wires go to or the board below (tcon I believe) that has a ribbon from the LED board going to it, then two ribbons out of the bottom of it to the LED screen?
Thanks
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