Question about Hitachi 43UWX10B 43" Rear Projection Television

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No picture or sound; 4 green LEDs and 1 red

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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  • erwinscotty Jul 01, 2008

    I have the same exact problem can anyone tell us how to fix this [problem and where we can get the parts i also bought mine at a yard sale and the exact problems are goiing on with the one i have ..i was hoping to fix the problem myself instead of taking it to the shop thank you to anyone who can tell me the problem and where i can find the parts

  • ml4th Sep 12, 2008

    garage sale purchase also - initially worked but now just the red light in the front and the continual clicking.

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  • 927 Answers

Good Day;
If you don't hear the relay click suspect Q003. No power suspect Q912, Q914 & I901. Good Luck, big IRISH.

Posted on Sep 06, 2008

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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/
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Picture calibration settings for 42lg70


Picture Menu
Picture Mode: Expert1
*Backlight: 16
*Contrast: 83
*Brightness: 53
Sharpness: 50
*Color: 55
*Tint: 0
Expert Control
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  • TruMotion: Low
  • Color Standard: HD (N/A w/HDMI)
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      • **Red: 1
      • **Green: 2
      • **Blue: -16
    • 20 IRE
      • **Red: -6
      • **Green: 0
      • **Blue: -7
    • 30 IRE
      • **Red: -5
      • **Green: 0
      • **Blue: -4
    • 40 IRE
      • **Red: -8
      • **Green: 0
      • **Blue: -4
    • 50 IRE
      • **Red: -4
      • **Green: 4
      • **Blue: -4
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Color Management System
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  • Red Tint: 0
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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

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1 Answer

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1)Replacement requires skilled soldering technique.

2)The IC's are on the largest heatsink on the chassis.

   Chassis will need to come out==skill and/or experience needed.

3) Possible bad fuse device in power supply,check any/all.

4) Re-check alignment.

 

PS.Name brand IC's last longer than generics.

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