Mitsubishi WD-65731 DLP HDTV (V33 chassis)

Bill --

Many people have had this problem - so many infact -- that Mitsu sent out a note that showed distributors how to fix this & extended the warranty. The problem is that a little, badly designed connector near the back of the set by the lightsource, wiggle loose randonly & results in the screen message you see.

This does not normally get better by itself.

The simple fix is to open up the back of the set, pull out the lightsource and its cage, and then clip the connector out of the circuit, soldering in a couple of 4" long spacer wires.

This is easy to do in a 1/2 hour; otherwise you can try to get someone to come in & fix it.

Go to these forums:

and read through the > 250 entries there. You'll get the benefit of many other users trials & tribs w/ these sets.

Best, Tom

Tom, Thank you for trying to help. However, that is old information. According to the tech who REPAIRED my TV, the vendor who supplied the thermistor assembly had used a connector designed for solid wire which did not properly crimp to stranded wire. Mitsubishi has issued a replacement part with the correct connector. Soldering is no longer the appropriate solution.

I no longer get the air flow message, the TV does not spontaneously shut down, all answers relating to the air flow thermistor are incorrect. I only mentioned the old problem so nobody would propose the wrong solution. I'm sorry I misled anyone.

Currently I have a new problem. The set is displaying incorrect colors. Rather than direct anyone to the earlier posting, it is reprodued here.

After the set has been on for an hour or more the color intensity will start flickering, followed a few minutes later by the colors dropping out. If I had to describe the problem, I would say that the controller for the DLP chip was not getting synchronization information from the color wheel. Within 10 minutes I will have a picture composed of various shades of pale green. I have verified that it is not the program source; it even shows up on the setup menus.

Other points: It is more likely to occur in the afternoon. This led me to suspect it is temperature related. I moved the TV away from the wall, checked there was no obstruction to the air flow and that the fans appeared to be running. Saturday I turned it on at about 1:00 PM, it was still working perfectly when I shut it off at 8:00PM. The problem did not reoccur Sunday or Monday. Today it occurred within an hour of the TV being turned on.

Now for the questions. Has anyone seen this problem? Does anyone here have any experience with Mitsubishi DLP sets? Is there an online forum that would be more likely to have such a person? Taking a pessimistic approach, it is likely to be a problem with the light engine. Is anyone willing to guess how much it will cost to replace it?

Thanks,

PlainBill

I have not seen that problem (yet). The most dense source of Mitsu DLP problems and solutions that I've run across is the cnet forum referenced above. I'd post this message there.

Best, Tom

Tom, thanks for the suggestion. I saw what appears to be the description of the problem on the AVS forums. I haven't had any response if he ever had it solved.

PlainBill