set came to shop with flashing leds.found 3 bad leds on 3 different strips using SJ led tester.replaced all strips with new ones from SJ.no joy. hard wired and soldered all strip jumpers and connections.also reflowed solder connections on power board where led connecter plugs in.same result.all 5 rows light up at plug in but after 10 min 3 rows begin flashing and nothing from other 2 rows.jumper 2 center pins on led plug all 5 rows light using tester.I'm thinking nothing else could be the culprit other than power board.anyone run into this problem?
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Re: lg 50lb6300 flashing leds after 10 min.
I forgot to add that the some of the voltages to the main board from the PS are reading negative. I found pins 1,2,3,5,6,7,9,10,11,14 and 17 are all in the negative. sorry, I posted to the wrong thread. -
Re: lg 50lb6300 flashing leds after 10 min.
....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=24809Comment
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Re: lg 50lb6300 flashing leds after 10 min.
turn down the back lights to next to nothing and see what happensComment
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Re: lg 50lb6300 flashing leds after 10 min.
He made new thread for his TV: https://www.badcaps.net/forum/showthread.php?t=75053Never 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=24809Comment
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Re: lg 50lb6300 flashing leds after 10 min.
Yes, sorry I replied to the wrong thread.Comment
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Re: lg 50lb6300 flashing leds after 10 min.
no worries...Comment
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Hi There!
Having fixed 5-6 TV sets by replacing full LED strips, and having watched other people fix that by replacing just one LED in the strip, my question now is what should I consider before doing so.
At this time I have some old strips removed from TV's with all but one LED working. Are there different voltage/current LED on different strips? Are 99% of them just the same and interchangeable?
How do you find which specific model is needed for each strip? When I check if a LED is OK by attaching the multimeter leads to the individual led pads on the strips I... -
Hello everyone,
Thought I'd share this find for the repair of an LG tv which had started to turn on but would only get flashing backlights. Backlights would flash at a few second intervals, and when I opened it, noticed that only the 3 bottom rows were flashing, the 2 top rows were completely dead. Replaced a few burnt leds (tested with my led tester), put everything back together, tested all led strips and they were all good, but again the 3 bottom rows would go into this flashing cycle.
Read all the discussions on the web and on Badcaps (wonderful forum!!) and... -
I have a pioneer A-307R here and what it does is flash all of the leds on the front and nothing more.
I got the thermal camera out on it and saw that Q451 was getting hot, so I removed it and the lights now come on as normal, but obviously that part of the amp doesn't work.
I tried replacing it, but it goes back to its flashing lights thing again.
I noticed too that on the back of the board R465 - R467 - R 469 are all getting red hot (over 100 degrees C)
Im guessing I have a short here somewhere, but so far I have not managed to find...10-05-2023, 03:51 PM -
Hi,
I am trying to fix this DK10FG board for a friend. It is not powering up.
When I plug-in power adapter, its DC IN led and Caps lock start flashing. Even cpu fan gets on/off kick like flashing leds. No battery attached. Nothing happens on pressing power button. I checked the charger IC and it seems fine. (ACOK - 3.3v). Re-programmed the bios but no luck.
I checked SIO chip NPCE885LA0DX and here's the reading
19,46,76,88,115 | P3V3AL_R --> 3.3v
102 | P3V3AL_EC --> 3.3v
4 | P3V3S --> Fluctuates from 0.2v to...10-06-2021, 11:17 PM -
Hello everyone,
I have this 55" LG 55LF652V-ZA smart TV which suddenly started flashing intermittently every 2 seconds with the backlight.
If I aimed the light bulb of my cell phone I could see the underlying image even in those fractions of time when the LEDs were off and the audio instead came out continuously.
Armed with a lot of space and patience, I decided to open the TV, immediately noticing that a LED had flamed out and also burned a portion of that reflective white panel behind the transparent LED diffusers.
...
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