Can We Fix this LG OLED TV? How to Diagnose Your TV Before Ordering Parts!
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- Опубліковано 28 вер 2024
- Avoid ordering the incorrect part for your LG OLED TV!
Demo model: OLED77B2PUA
This tutorial applies to all LG OLED TVs
First, remove the back cover and power cord
If you power the TV on and hear a single relay click and the standby light flashes once, it means your main board is good.
Test the power supply by checking the 23V and 12 volt rails. With the multimeter probes in place, power the TV on. You should see the voltage come up briefly and then drop.
If you briefly see the voltage, disconnect the drive cables from the main board going to the T-con
Now recheck the power supply voltages. They should come up and stay.
This means the power supply is good and indicates a shorted panel which cannot be repaired. Contact the manufacturer if your TV is still under warranty.
I put out a question about my 77 inch C2 that the power light would stay and standby only blink once most opinions was it was a fried panel. This video tells you if you plug it in and the relay doesn’t click then it’s probably your main assembly board tried that didn’t work. Tried the power supply that didn’t work. I knew the power supply probably wasn’t gonna fix it. So I went on eBay found a Tcon bored it was 30 bucks plus shipping and that’s what was wrong with it so I spent almost $200 on two boards that I didn’t need to replace. I’m not saying this video is wrong in some cases but in my case like people on here that have tried the same thing and it didn’t work. You need to look at the Tcon bored as your culprit
I get a click on the relay and then the light pulses. Everything else operates as indicated in video. Thoughts?
My TV is making a very loud buzzing sound through the speaker and the problem stays even when plugging a sound bar or an external sound solution I tried unplugging it leave it and plugging it back I tried resetting it I unplugged the cables of the motherboard then plug them back nothing worked the TV works fine but the buzzing is there and it won't stop even when the TV is off
HI
I have lg oled 2016 i dont have 12v and 24 vold in my panel.. connected to the Con board.. what could be the problem
If I hear the relay click but the LED light doesn't flash what does that mean?
If there's no LED at all probably a main board fault.
Otherwise a panel fault still needs to be eliminated as a cause.
I'm currently working on a 48" and the lower 2" of the screen get horizontal lines and then the TV turns off. I already tried replacing the TCON board but the same issue persists. Now I'm between the main board and the power supply. I'm thinking the main board is the fault but could it be the power supply? TV only stays on for about 3 - 5 seconds. First 2 seconds there are no lines, they they appear and then a second afterwards the set turn off.
Likely the panel. PSU doesn't cause lines . I repair tvs. Panel or tcon. The lines you described are panel.
Did you finally figure out what's causing the issue?
my c1 77 oled is not turning on display but standby light blinking I here clicking on and then another slightly different click and this repeats but nothing displayed. on click is more linked the ping sound panel usually makes when turning on or off. it will not power off via remote or physical button have to pull the plug. I have extended warranty but we do have consumer guarantees by law here so retailer has arranged with LG. hopefully it's fixed by them as manufacturing issue. I saw one pot saying this is known issue by LG pointing to power circuit as failure point. TV has worked very well since we got it mid 2021. We only had 1yr warranty knowing lg offers 3 4 years I think. have u seen this cyclic clicking sound b4?
LG repairer resolved my issue it was faulty relays on the power board, replaced that and tv is working again.
Hello@@netwolfstar i have a sinilar situation where the led blinks and relay clicks every 4 seconds. Did your TV have the same symptom?
I have LG 55EG960V. Screen stays of and only LG logo is blinking for 30 seconds or so. I can't hear any clicks. Would that be power supply board or something else?
Siempre se debe desconectar la alimentación de la t-com para ver si es problema del panel. Desde el cable lvds de la main más estrecho se puede activar el test pattern y forzar el encendido del panel.
Saludos , cómo puedo forzar el encendido del panel , me podrías dar detalle.?
@@angell.3779 alimentando el panel desde la t-com si ves el fusible. Las t-com suelen ir a 12v
My TV doesn't turn on at all, no light, nothing. I ordered a new power board from you. hope that's why. LG OLED77C18LA
known issue it's the power supply
I apologize they’re getting 7.86 V to where they should be 20+ volts
tanx
????? 😮
I think that if the voltages are not what they "should be", then, you have a bad power supply.
hi
what tools use for lie the oled tv ?
what if tv turns on and turns off without beep sound under 1 minute?
6 year old LG OLED 55". The display is physically damaged, shows colored stripes, but turns off after about 1 sec. Where to order display panel?
do you know if US versions of LG OLED TVs can work overseas with 220 volts? I know the sticker says it is 120V only, but people in the internet are saying it should work
OK, so my voltage is sitting at .550 on the different leads that I go to. What does this mean?
With everything connected, when I plug my TV in the standby light goes out briefly and turns back on (but no relay click) Does this mean my mainboard is still good? If I disconnect the lower ribbon off the main board where it says P7601 when I plug the tv back in I get the standby light, relay click, then i get three additional standby blinks then the standby light turns off entirely. My board shows 22v and 12v constantly so I think my power board is good.
@@larrylupe yours is doing the exact same thing mine is I changed the main assembly board and the power board when I change your main assembly board first I noticed the optical light was on. It wasn’t with the original board when I change a power board the new power board when you unplug the lower ribbon cable and plug the TV in the relay clicks often on constantly so I’m beyond confused
I have 19.2 volts at the 24 and 12 at the 12v plug. I am gonna assume that means power supply board? Tv turns on then turns off within a minute perfect picture until that.
I should also include it has constant at both pigtails. There's no drop off with unplugging the tcon
Good luck sir 🎉
I have a question. I have a 77 inch LG C2. I believe lightning hit our dish because every TV in the house. The cable boxes went off but in our back bedroom, the cable box went off and the TV. So I took the back off, watched your video Plugged it in waiting for the relay to click it never would click check the voltage on the 12 V rail. I was getting 8.3 V but it never dropped down checked the 24 V power rail and could barely get 2 mV so I assumed it was the main assembly board get a main assembly board plug it in with a ribbon cables on and the relay still doesn’t click on the power board unplugged the TV take the ribbon cables off and when you plug it back back in the standby light is now blinking three times so I checked the voltage. I have 20.2 on the 24 V rail and just under 12 V on the 12 V rail confused and also not a TV repair man do you think it’s a panel or the power board which by the way I have ordered any help would be greatly appreciated thank you
remove all 5 cables to the panels t-con and try to turn the tv on, if it turns on logically without any image then your panel is shorted. You can also measure the voltage from the black/white 24 pin cable (there is an 24 on the cable) that comes from the power supply to the Mainboard there are small pins at the mainboards socket right at the socket where the cable is seated in. Measure all of them one should be at 3,3v in standby.
@@Darksidewolf1996 you said remove all four cables. Are we talking about all four ribbon cables? I know this that when you remove the bottom ribbon cable from the Tcon to the main board and then trying powering the TV on the standby light will go off like it normally should when you are trying to turn the TV on. I replaced the power board. The relay will only click off and on consistently when you remove the bottom ribbon cable from the Tcon bored
@@romcapprotti1976 fried Panel
@@Darksidewolf1996 then this video is wrong because the first thing when he takes it back off, he tells you to plug in the power source the relationship click on the power board it doesn’t do that so that would lead you to believe it’s a main assembly board because he said if relay clicks then the main assembly board is good well that’s not true cause I replaced the main assembly board and you only way it will click as if you remove one of the ribbon cables the bottom one the only thing by replacing the main assembly board did is the optical port lights up with the original main board it doesn’t so I’ve replaced both board in each board. It does something different. I don’t doubt your diagnosis. You probably know way more than I do, but could it be the Tcon bored at this point what do I got to lose? I can get one for 35 bucks thank God I didn’t buy these boards new. It’s frustrating that a TV that’s a year and a half old I’ve had nothing but problems. LG is already replace the main assembly board onceand in four months out of warranty it’s most likely ready for the dump.
@@Darksidewolf1996 and by the way, thank you for responding most people don’t
LG 65C8PLA used to switch itself on and off a couple of times a month.
Recently, it's switching itself off but staying off. It does this every 20 minutes or so.
Any ideas on what's causing this?
Cheers.
It means it's overheating. My CX was doing the same thing. I replaced the thermal pad in-between the soc and the vapor chamber. I also cut a hole in back case and installed a 120mm computer fan over it. This fixed the issue.