Question about Mitsubishi WD-57732 Projection Television
This TV is 18 months old (built Dec 2006). Used an average of 4-6 hours a day (typically on BRIGHT mode). Which would mean about 2200-3500 hours on the bulb, which is a little on the low side but not unheard of from what I have read. Until about a month ago it worked flawlessly. Then it started with the message that it was over heating and would shut down and to check the airflow. It did this like three times that I am aware of over about a 2 week period. Normally waiting a minute or two and turning it back on would solve the problem. Then last weekend it just turned itself off and the red lamp indicator came on. Turning it back on resulted on sound for a minute or two and then it would power down with the red light. I purchased a new Osram P-PIV132-150/1.0E22h bulb (the original bulb was marked P-PIV132-150/1.0 ASP) and carefully installed it wearing gloves so as not to touch the bulb directly. I also confirmed that the vents were not clogged or blocked. It fired right up with a beautifully bright picture (forgot how nice it looked when brand new). Three days later it again went dark and soon shut itself off and the red indicator is back on. I have tried resetting it and unpluging it and letting it cool for an hour with no success, all I get is sound for a minute or two before it shuts itself off.
I removed the lower back panel and taped down the interlock switch. I verified that all three fans are running. I also notice a brief "ticking/arcing sound" coming from the ballast. This happens three times when it attempts to start up and after the third time the TV shuts itself down. Is this noise normal or does it indicate a bad ballast? I pulled the lamp assembly out and the bulb has developed a white frosting about 1/4-1/3 of an inch across on the front of the bulb directly above the center element. Again is this normal or does it indicate a problem? The old bulb also had a smoky white appearance but it was more diffused over the entire surface. I tried reading the error code(s) using the INPUT and MENU bottons and it does flash something but I'm having trouble reading the code. I also contacted the Mitsubishi customer support line about this. I asked about an updated code list and was told they don't have one or that it is only for service personnel. I asked to talk to a actual technician and they hung up on me. Finally this TV has not had the lamp thermistor replaced or modified.
My mitsu wd-y577 television has little white dots all across the screen and it gets worst everyday the dots cover 40% of the tv help
Posted on Dec 07, 2010
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