Chosen Solution
After watching tampertecs videos (but no one of contacting him) I want some advice as i am new to fixing TV’s. The TV in question is a LG 42LN5400 which has a EAX64905301 Mainboard. I originally thought it was the TCON board but after finding a 2nd hand tested unit from a cracked Screen i still have the same issue. No capacitors look or feel like they have blown and you can see the image with a torch but its very dark. Test Results: P201 - (18 Pin Connection to Logic board) Off / On Pin 1 - 0.00v / 3.20v Pin 3 - 3.39v / 3.42v Pin 5 - 3.39v / 3.42v Pin 7 - 0.00v / 0.00v Pin 9 - 0.01v / 24.10v Pin 11 - 0.00v / 0.00v Pin 13 - 0.02v / 12.14v Pin 15 - 0.02v / 12.14v Pin 17 - 0.00v / 0.00v unable to test pin 2 - 18 due to my probes being too big. P802 (4 Pin Connection to LEDs) Off / On Input - 107.4v / 216v-233v 37" - 43.2v / 142v-164v 39" - 43.2v / 148v-165v 42" - 0.08v / 0.73v Looking at P802 as the TV is a 42" i am guessing the low voltages are pointing to the main board being damaged rather then the LEDS? Any help in aiding me with this would be great as I continue to learn. UPDATE - Tested all LED strips and I have 1 LED not working however would this cause the entire lot to fail or not illuminate?
Is the TCON related to the backlight, because the backlight is not working from the description you’ve given.
Anyone? Thought there would be more experts who could answer with the test results I have provided
