Question about Mitsubishi WS-65869 65" Rear Projection Television

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My Mitsubishi WS-65869 tv has no picture but there is sound. There's an orange glow at the base of each of the bulbs, but the blue bulb does not appear to come on. The screen is black except for faint green and red lines. I've repaired the DM board recently, due to the blinking green light of death, and everything was fine. As I was watching the tv it scrolled briefly and then the screen went black.

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1 Answer

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I know these sets pretty well--worked on a lot of them when new and later--one of two possible ideas=

1. Either a odd convergence problem==confirmed or denied by going into the convergence menu (in customer menu) and selecting advanced which will bring up a grid of lines--if see the same issue (I will attach a photo of a Mitsubishi with this problem) it can be fixed.

2. Some sort of issue with the circuit board on the end of the Blue tube(you are missing blue=black) but usually in this set if that happens it is uniform and on both sides of the screen, not the top.

Let me know what you find.
4_7_2012_12_12_34_am.jpg

I doubt it is convergence, but does not hurt to look--if the missing area was perfectly rectangular I would suspect up/down centering adjustment.

There is one other possible thing to try--we will leave it for last--set has 3 hidden menus and one is OPTION menu which allows a hard reset of entire set--sets everything back to factory except convergence adjustments which are stored in another area.

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1 Answer

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1 Answer

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Oh, and BTW that unit has three small picture tubes in it, one red, one blue, and one green. It doesn't have a 'bulb'.

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One of the 3 CRT's being bad is a possibility but more than that at one time no. If the picture doesn't come on at all or any menus showing up the most likely you have a power supply or high voltage issue. Have a technician look at it for the best diagnosis.

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