73" Mitsubishi- great sound no picture. I have reset the system twice. TV stays on for about 1 minute (no picture) then turns off. The light for lamp is red.
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System Reset
Step 1
Open the front panel by pushing on it. Pressing on the panel releases the lock and allows the front panel to pop open slightly. Pull the corner gently to open the panel completely.
Step 2Use a pointed object, such as the sharpened end of a pencil or the tip of a paper clip, to push the "System Reset" button.Step 3Wait about one minute, or until the green LED light on the front panel display stops flashing.Step 4Turn your television back on once the green LED light turns off.
It sounds like either the controller is bad or the color wheel or scanning sync encoder is dirty or defective. One thing to try is to reset the controller program by unplugging the TV, wait two minutes, then power it ON. The micro-controller will reload it's program from flash memory (which takes several minutes). When the lights are all OFF, turn the set ON and see if the picture is correct. If you select the menu and the picture of the menu is stable, then the problem may be in the signal coming into the TV. Regards.
Sounds like the CRTs are going into protective blanking due to the vertical output ic needing to be resolderd. Try resoldering the vertical IC that may possibly fix the issue.
It could be a bad lamp but I've run into many of these TVs with bad color wheel assemblies. Also, if you are getting a dialog box coming up with these words," airflow blocked, TV will shutdown ..." that's a defective thermal fuse.
This is a job for a mitsubishi authorized service center. A tech can disassemble the light engine and confirm that the wheel is the problem. If you're still in warranty, great. If you're only recently out of warranty, call mitsubishi for assistance. Remember that persistance pays off when dealing with large corporations. You very seldom get what you're looking for on the first call or from the first person you speak to.
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