Question about Hitachi 51SWX20B 51" Rear Projection Television

1 Answer

Red out of alignment then all went black. Hitachi 51SWX20B

Hello Experts,
My mothers TV stopped working today. Just before it quit showing a picture it looked like the red had shifted from the greens and blues. I went to the magic focus setting on the remote and it started to go through the magic focus utility and then it just stopped midway through the first color (Red) It then went back to the picture mode and it was the same... Red was shifted. The picture went black shortly thereafter. There is also no sound now. The red power light does come on when pressed. But goes off after a few minutes. There is also a faint clicking sound. from the back of the set. I am a PC technician but do not know much about TV sets. I need to mention I had a Comcast guy here the other day to clear up a tiling problem on the HD and it all went well. I think... The screen had like tiles randomly appearing and the sound was on and off on and off. I have been having this problem everytime it rains or a snowflake flies, and sometimes when a cloud passes over the house. It usually clears up by itself. This time it lasted a few days so I called. The TV was working great. The guy did check voltages and worked on the pole and changed a connector at the house. There is an amplifier and 2 splitters I think in the basement. We also have 3 other TV's but they are just regular cable... Not HiDef. The one that went out has its own Comcast HiDef Box. Is there a chance it could be Comcast? Maybe just a Strange coincidence? Any help would sure be appreciated.

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  • nanodano May 08, 2008

    I changed the 2 convergence chips and still the set will not come on. The chips were STK 110 AND STK 150 - I replaced them with the STK 180 chips and It was a perfect swap and solder job. When I plug the set in the board comes alive but, there is 1 green diode that clicks and flashes 5 times then goes out along with all the other lights. There are 3 boards. The bad light (diode?) is near the top of the center board. It is the second green light from the top . I should add that It also looks like a tiny green (resistor?) has gone bad by the IC's... it has a black discoloration in the middle of it. All the other ones look bright green. Also the flyback transformer is a brownish color around the base of it . Is this just normal for the flyback because of heat being generated by the transformer or is this possibly the part that needed changed all along? I was going to use the premium service but it is not working. Can someone post and help me get through this. I am a PC repair tech nor really a TV repairman. If you have PC problems I can help. ASK ME! From one tech to another I have TV problems can you please help me? MOM is getting stressed.

    Thank you everyone.


  • nanodano May 08, 2008

    Here is the picture of the diode that flashes and clicks. Can someone tell me what the 5 flashes and clicks mean?

    Hitachi 51swx20b

  • nanodano May 08, 2008

    The green diode that is clicking and flashing is circled in yellow and also take a look at the flyback. I took the set outside and lightly airchucked the bulk of dust on the boards. Those are the 2 new STK 180's. The discolored resistor is also circled in yellow.



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The resistor near the Convergence IC is most likely the problem go to the link that I am posting and enter the resitor location such as RZ129 or whatever it is and they will tell you the rating of the resistor that youre needing.Include your model number

Posted on May 17, 2008


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HELP! Can you help me Slinte?

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