Question about Mitsubishi WT-46805 46" Rear Projection Television

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Mitsubishi WT-4605 - picture going dark, comes back

The picture on our set fades out and finally goes black.  Comes back again good as new and goes thru the process again.  Ideas?

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Good Day, rflinker;

Please check for fluid on the TV's PCB's, look toward the front of those boards, ensure all cables are properly seated into their sockets.


Good Luck, big IRISH.

Posted on Jul 25, 2008

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Many sets that use lamps do this right before the lamp fails--average life is 2000 hours or 2 years of normal use--if no blinking lights suspect the lamp first.

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You've got a bad solder connection,or broken foil line,s on the pcb (printed circuit board1.gif).Narrow it down by pressing in different places,or use plastic or rubber tip.If not,then you got a shorted load on this fuse and diode.do you have a schematic,whats at the end's of this circuit.D represents a <Diode> not a transistor.

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Fuse will not be bad if green power light comes on and stays on--if it came on and went off there is a self check.

Likely issues: if no sound also-----problem is in either power supply or set is in shutdown---has a latch circuit.

I have another suggestion based on having worked on hundreds of these sets-----Look first directly under the picture tubes and above the main boards---is there a gray or black plastic tray running under them?

Let me know what you have tried etc by pressing the "make a comment button" here-----

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awewryte,
I have the same TV and now have the identical problem that you described. Did you ever get it fixed or find out what the problem was? If so, will you please pass the information on?
Thanks.

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Good Day, Nickb2b;

The IC's you installed will not cause a dark/dim picture......but I would like you to check two things:

1. Make sure you put all cables that you may have unplugged into their proper positions, the cables are marked with numbers, ensure all cables are properly seated,

2. Look for fluid on the PCB's.

Good Luck, big IRISH.

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Good Day, Corri;

It sounds like the TV has a Circuit problem in the convergence circuit. If it comes and goes then the concern can be corrected by re-soldering the 'conv' output IC"s. A semi-minor repair and cost.

Good Luck, big IRISH.

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