Kevin456
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Jun 16, 2017, 9:52 AM
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LG 42LN5400 - Dark Screen (Image visable with Torch) with Sound (Including test results)
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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 after reading various forums and watching videos 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. - You can see a dark image with a torch - The TV still has sound 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 Pin 2,4,6,8,10,12,14,16 & 18 unable to test 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? UPDATED - Tested each SMD LED and 1 is blown.. Would this cause the entire lot not to illuminate? Any help in aiding me with this would be great as I continue to learn. Regards
(This post was edited by Kevin456 on Jun 16, 2017, 10:00 AM)
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