Re: LG 65UH5500 Momentary Flash Of BackLights
Lg65uh5500
What I finally found out about this tv's failure is the led connector to the led power board plug in connection is a bad wire connection to the led power board pins. I removed each wire from the connector and carefully crimped them tighter.
I did replace all leds with a set from shopjimmy previously. I too was getting a group of 4 leds strips not lighting up after replacement. That was caused by the bad connector pins connection. I also decided to do the resistor mod on the led power board and tested about 53.1volts...
Pitoniak
Member
Last Activity: 01-22-2022, 05:14 PM
Joined: 01-05-2017
Location: Dallas/texas
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Re: LG 50UH500 LED Current Mod help needed
I have the 65uh5500 . I will do the mod on led board by removal the resistors as indicated.
But I have a question regarding this mod. First of all by removing the fail safe wire and turning on this tv it operates perfectly. Reinstalling this wire and it shuts down. The voltage is 90v the led board it should be 80volts. Will mod fix the shut down with the fail safe wire connected? Also what if I use the tv without the fail safe wire installed on? It seems as though the fail wire is installed for led failure or maybe over voltage....Leave a comment:
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Re: LG 50UH500 LED Current Mod help needed
So was this resistor mod done on a lg65uh5500?
What resistors on the led driver board where removed?
All the threads on this referred to the lg50.
Need to know if I can do this mod to my lg65uh5500 tv....Leave a comment:
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Re: LG 65UH5500 Momentary Flash Of BackLights
Where is the main cap or what is the uf of the cap you are talking about??...Leave a comment:
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Re: LG 65UH5500 Momentary Flash Of BackLights
That’s the first thing I did when I replace the main bd is lower the the back lites . I think that is the main reason why thiese tv fail when new customers don’t turn back lites down.
Question how did you lower the power out put?Leave a comment:
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Re: LG 65UH5500 Momentary Flash Of BackLights
Something is making all of these lg65uh5500 fail the same. I wonder if it is a defect main bd icu chip that lg is using or is something else. We know for fact the leds are crap. That’s way I replaced my leds with shopjimmys improved leds or so they say. Or maybe something on the led driver bd? Scratching head?Leave a comment:
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Re: LG 65UH5500 Momentary Flash Of BackLights
Again I swapped the position in a known good position and they lit upLeave a comment:
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Re: LG 65UH5500 Momentary Flash Of BackLights
Replaced all leds from shopjimmy, before replacing leds turned tv on with fail wire disconnected and all leds turned on. After replacing all leds I turned tv on with fail wire disconnected and now 4 strips on upper right doesn't turn on. Swapped led positions with known good leds and they won't turn on. Need the check wires to driver bd first. But this is all pointing to another main bd again? Is there anything else I need to do or test?
I was not sure if that main bd I originally replaced was brand new!Leave a comment:
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Re: LG 65UH5500 Momentary Flash Of BackLights
Problem was the main board
Was getting no “Drive on “
voltage from the main board to the led driver board.
R&R main board on line for $126.Leave a comment:
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Re: LG 65UH5500 Momentary Flash Of BackLights
[QUOTE=Pitoniak;937921]I have the same lg65uh5500 with these symptoms:
Power tv on no lg logo flash and nothing shows with flash lite test.
Power button flashes three times.
Red lite on main bd.
Led test 54.1v on all pins of led driver bd connector.
Power bd has 90v on four pins 12.67 on three pins and 3.3v on stand by pin.
Led driver bd connector to main bd show drive on and stand by .6v next two pins 12.67v.
Removed fail wire to ps bd at connector no change.
On main bd connector...Leave a comment:
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Re: LG 65UH5500 Momentary Flash Of BackLights
I have the same lg65uh5500 with these symptoms:
Power tv on no lg logo flash and nothing shows with flash lite test.
Power button flashes three times.
Red lite on main bd.
Led test 54.1v on all pins of led driver bd connector.
Power bd has 90v on four pins 12.67 on three pins and 3.3v on stand by pin.
Led driver bd connector to main bd show drive on and stand by .6v next two pins 12.67v.
Removed fail wire to ps bd at connector no change.
On main bd connector Has 12.67 on two middle pins...Leave a comment:
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Re: LG 65UH5500 Momentary Flash Of BackLights
Where is the main filter cap you are talking about on the ps bd?Last edited by Pitoniak; 01-22-2020, 11:20 AM.Leave a comment:
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Re: Lg65ub9200
I r&r power board no help.
I got different symptoms i.e. Relay clinks on then off- no red on main board and no red lite blinking on power board. Defective board from
Shopjimmy? Leaning to the main board.
Anybody got a cue? Reinstalled original power board and it returned original symptoms of post 8/20/17Leave a comment:
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Re: Lg65ub9200
Pic of panel
Also no backlite menu or sound...Last edited by Pitoniak; 08-20-2017, 06:47 PM.Leave a comment:
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Re: Lg65ub9200
Picture of lg65ub9200 panelLeave a comment:
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Lg65ub9200
Lg65ub9200 no pic standby volts on power bd
3.5,12,24 volts ok
Blinking red lite on power bd- blinks 5 times then repeats
Red lite on main bd
No back lite using flash lite test
Don't know if sound works
What should I check next? Help -
Re: Lg60pb6650 pic flashes gray than off
Help you how?Leave a comment:
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Re: Lg60pb6650 pic flashes gray than off
What does mean?Leave a comment:
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Lg60pb6650 pic flashes gray than off
Lg60pb6650 standby lite on- hit power button- picture flashes on with gray screen than off. Caps all look good. -
Tv lg
Lg60pb6650
Stand by lite on - push on button hear clink-picture flashes gray
No activity results to display
Leave a comment: