Need help! I have an LG tv that's flickering. The model number is 55LB5900. I have replaced the power supply board & mainboard.
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Re: LG tv flickering
You probably have a led or two that are shot. You'll have to open her up and check the leds. I just finished repairing an LG 47" with exactly the same problem and it had 4 leds that were the problem - 2 burnt and 2 shorted.
Mine was an lg 47lb5830Last edited by rddube; 07-30-2018, 03:37 PM.
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Re: LG tv flickering
You will get a lot more help if you upload pictures.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809
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Re: LG tv flickering
If you turn on the TV in the dark room and watch backlights coming through some of the holes on the back of the panel, do you see the backlights flicker?Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809
Comment
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Re: LG tv flickering
You have two strings of LED so there are two pair of wires so check the DCV on all 4 pins of the LED connector to see what Voltages you have against chassis GND while the backlights are flickering.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809
Comment
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Re: LG tv flickering
Originally posted by GAStuntman View PostThe LEDs was the issue with this tv.
If you are going to be working with a lot of newer TV with LED backlights you should invest in LED backlights tester.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809
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