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On my Mitsubishi ws 65819 I can unplug the tv in and run the menu input and it gives me a 12, after I turn it on for a second I run the diagnostic again and it gives me the 21. I have the service manual, schematics, and pcb layouts. Is this something I can fix or am I waisting my time? Thanks, John.

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  • john_davis22 Aug 30, 2010

    Thanks, ABJ, found some whitish liquid on one of the boards in a spot about the size of a half dollar with a few stray drips. should I just wipe this off?

  • john_davis22 Sep 22, 2010

    Thanks for the info, got busy and just got back into looking at this thing. Now I have power, not getting any error codes, I have sound, all menu capabilities, closed caption, but no picture. Can you help me out with this. I would really appreciate it.

  • john_davis22 Sep 24, 2010

    I have been working from the front of the tv so I will do my best to describe it that way. Keep in mind when the tv was turning off after a few seconds and giving me the error code, I had picture, like I said now that it stays on I have none. Anyway, If you were looking at the tv as if you were watching it,I found the fluid on the front, middle of the bottom right side board, it is the only green board on the bottom and it takes up 1/3 of the bottom area. Man I wish there were guys like you locally for hire. Oh well, let me know if this helps and I really do appreciate your knowledge and time. Thanks

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21 is the x-ray protect mode. This means you probably have something wrong in the high voltage/horizontal deflection area. Check for coolant leakage from one of the crt's onto the deflection board or possibly onto one of the others causing corrosion to the copper traces and/or components. Post what you find.

Posted on Aug 28, 2010

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  • abrownjr Aug 31, 2010

    Go to a local electronics parts house and get a can of board wash/solvent. A salesman should be able to help you. Remove the board from the set and take it outside and holding it by the edge furthest from the problem thoroughly rinse the affected area. I usually start spraying above the area and work my way down to the edge. I also use a 3 to 4 inch paintbrush to clean the board. If you have access to pressurized air use it to dry the board. I often just take a paper towel, lay it over the wet area, and use the paint brush to kinda dab the paper towel down between the components to dry the board. just keep moving it around and dabbing. After it's dry, reinstall and see if the set works. If not you will probably need a new board as the coolant corrodes the copper away and that's pretty hard to fix.

  • abrownjr Sep 22, 2010

    As you look at the chassis from the backof the set, which board did you find the liquid on?

  • abrownjr Sep 24, 2010

    There are a lot of very smoll holes that are "feed throughs" joining one side of the board to the other side electrically. One or more of these tend to corrode from the liquid and loose contact between sides. Also there is an IC in that area, I think the number on it is CX2101A or something very similar, and it tends to stop working for some reason after contamination. All of this circuitry is in the video processing area. This board is the Signal PCB, part number 930B881001. At this point your best bet is to send it to a rebuilder or try to get a used one as it is no longer avail. from Mitsubishi. A rebuilder: 800-844-7871 Call them and make sure they can rebuild this board as parts are getting scarce. A used parts seller: Shopjimmy.com
    Good luck with this.

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