Chosen Solution
HI there, This question is in relation to my previous post where I had originally asked for a solution for fixing a backlight that will randomly turn off while maintaining a picture and sound: UAH50HU7000 - Backlight turns off occaisonally, turns back on While that answer was informative I still havent “Fixed” my problem. However I have found that when the backlight does turn off, If I measure the resistance of the first power pin and a ground, with the 2000kOhm setting on a multimeter, it flicks the backlights straight back on. I use the pin labelled (375)
Why would this happen?
Hi Connor, Measuring resistance will not give you any reading that you can use to troubleshoot your TV. You need to measure the voltages on the connector but not just the top ones but also the ones underneath. You should have 16 pins in total (some of which are not connected but it tells you on the power supply board. I had a look on your previous post and saw the pictures. The way to read the layout of the connector (CNL802) is simple. Pin 1 is marked by a tiny white arrow and you should also see 1 and 2 labeled on the connector so is pin 15 ad 16. According to the connector you should have 3 strips or 3 arrays of LEDs in your TV. Both having a positive and a negative input. Try disconnecting the cable form the array and measure voltage in every pin that should have + symbol in it. Pins 2, 6, 10 should have voltages in them. Sometimes the reference voltage si is mentioned on the board somewhere. If you have a stable voltage then your strips are playing up and some LEDs might shorted intermittently.
