Again thank you for the help.
Cheers...
engyshe
Member
Last Activity: 01-10-2025, 11:10 AM
Joined: 01-13-2015
Location: Kitchener
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Re: 55LA6205UA LG with unusual issue
Again thank you for the help. Cheers...
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Re: 55LA6205UA LG with unusual issue
Here is a crazy idea. Would placing a 3/4" wide Kapton tape over the center connection be counter productive in any way. I do not see how (the tape is designed for high temperatures, it is not electrically conductive, it is ESD safe, holds well). If this is truly a failure mode, it means that LG failed in the design between the mounting of the LEDs and the strip temperature expansion, and help to re-enforce the joints would be a good idea.Leave a comment:
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Re: LG 55LW5600 No Video No Sound
I will contact repair shops and send my board out. I will verify that panel LEDS are fine first and then do that. Thank you for the help and your time. CheersLeave a comment:
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Re: 55LA6205UA LG with unusual issue
Thank you all. Now that I think about the suggestion of center connections going bad, it totally makes sense. That is the only thing that can explain 90 minutes off time after 20 minutes on time with LEDS being actually ok. With active heat it takes 20 minutes to stretch the led strip and 90 minutes to contract back to the original length and make contact again. This was cool. Thank you
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Re: 55LA6205UA LG with unusual issue
Thank you allLeave a comment:
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Re: Looking for service manual for LG 55LA6205 TV
Thank youLeave a comment:
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Re: LG 55LW5600 No Video No Sound
Here is the panel number LC470EUF (SD) (F2)Leave a comment:
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Re: LG 55LW5600 No Video No Sound
I see. I will look when I get home. None of my pictures cought that detail.
I have been reading service and training manuals, but could not figure out how to determine if backlite diodes are fine if there is no mainboard 3.3V to supply TCON board and other controls. Unless it is this 220ohm to ground test. In that case, should I disconnect cables between main and TCON board (LVDS/power)?Leave a comment:
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Looking for service manual for LG 55LA6205 TV
Lg 55la6200 55la6200 Ua Led Tv Service Manual
I can not find this service manual to download. Does anyone have it? Thank you -
Re: 55LA6205UA LG with unusual issue
Thank youLeave a comment:
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Re: LG 55LW5600 No Video No Sound
Tv model is 47LW5700
LA12C is assembly number
main board EAX64344102(1)Leave a comment:
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55LA6205UA LG with unusual issue
TV works for 20 minutes. Then the screen goes black but the sound stays on. It comes back normal after 90 minutes (not seconds). If I turn off the TV and then back on again before about 90mins, it will flash the LG logo briefly then will be black again. Unplugging the TV and plugging it back in makes no difference.
I do not understand where this timeout of 90 minutes could possibly be coming from. Any ideas. Thank you -
Re: New Members - please post your introductions here
Hi, This is my first post. I live in Canada, but am from Europe originally. I love electronics and being here feels like paradise. This i my kind of reading. More later. It took me w while to figure out how to post here. LOLLast edited by engyshe; 10-28-2020, 02:28 PM.Leave a comment:
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Re: LG 55LW5600 No Video No Sound
Late to join this discussion, but my TV just failed. This case is almost identical in part to mine. I also measure ~13 ohms from 0.9_core rail to ground. I also measure the same ~12-13 ohms from 3.3V_norm rail to ground. Replaced IC505 no luck.
All connections between the two are through at least two resistors. Another common point is the main controller. Any other ideas? Thanks youLeave a comment:
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