I recently got this 43UWX10B from a garage sale for really cheap because it said that it had power-up issues. Thinking I could probably fix it, I brought it home. I got it home and tried starting up and all I heard was a click and the red LED on the front panel just stays on. I opened up the back and saw that there were 4 green LEDs that were constantly on and 1 red LED that was also contant on. I checked the two fuses on the power board and they were fine. I read on a few other posts that I should check an E994 fuse and C702 cap. I can't seem to find those. Does anyone have a service manual or schematic I can use?
I think the guy at the garage sale said that he took it in to be looked at and the repair guy said he could fix it for 150 if that narrows down the issue for anyone.
Also, there seems to be a highlighter mark on a component marked I902. I'm not sure if it's a mark left by the repair man so he could remember what to change or what. It looks kind of like the small fuses we put on our boards at work, but I can't read the lettering on the component. If it is a fuse, then it and the one next to are both open. In which case, does anyone know where I can get the parts to replace it?
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Fault at its main digital board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. http://electronicshelponline.blogspot.com/
In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.
When u turn the tv on,u hear alot of clicking?That mean the Ballast that help the projection bulb to work is dead.Change the Ballast,might as well change the bulb too.U don't know what is the condition of the projection bulb in.
Picture Mode: Expert1
Fresh Contrast: Off
Noise Reduction: Medium
Black Level: Low
Real Cinema: On
Color Standard: HD (N/A w/HDMI)
White Balance: Warm
**Method: 10-Point IRE
Color Management System
Red Color: 0
Red Tint: 0
Green Color: 0
Green Tint: -15
Blue Color: 0
Blue Tint: 11
Yellow Color: 15
Yellow Tint: 2
Cyan Color: -15
Cyan Tint: 0
Magenta Color: 0
Magenta Tint: -1
lg70 nice tv excellent processor just to bad there is no intensity control on color management oh well still better than what the three s are pushing block out the hype lg will be number 1 in a few years haters are starting to come around and well leds coming,
p.s. i dont work for lg just tired of losers bashing stuff because they dont own it. im isf certified those settings are right on the money straighter than a ruler
Remove the rear panel. With the TV on you should see a red LED near the center of the PCB. There should also be 5 green leds, 3 to the left a 2 behind. If there is no red leds, check the fuses. If there are no green leds or maybe 1 or 2, disconect PSD5. It's a connector on the left side of the power board that connects to the audio board. It's the 3rd on fro the back. It's labled. With that disconected, turn on the set and look for the green leds. If all 5 light, the power supply is OK and you have a problem beyond that. If they don't all light you have a bad power supply.
Sounds like you are on the right track in troubleshooting, but for this set there are a few things that would baffle most techs. Like in your case it could be as simple as redressing you auto link and 4 event timer cable. There is a problem in this set when the Cabling from the front control panel is too close to the Blue CRT-yoke HV lead. Redressing this may solve your problem. For more info on this ctechnicians.com
This set is going into shutdown. It has a safety feature that will not allow the set to turn on until it checks certain circuits.
Inside the set there are multiple Red LEDs and one green one, that light up at turn on. One of them is not turning on and thats the circuit that needs repaired.
The most common I've found is the Horizontal Output circuit. Usually the fusible link on the secondary in the power supply. Sometimes it goes as far as the High Voltage Transformer. Of course this is just one of the possible four circuits that cause this symptom.
Hope this helps.