When I turn on my Mitsu WD-65C9, all I get is blue 'Welcome' screen fo r several seconds, and then TV shuts off. I loaded the software upgrade, but it didn't seem to change anything. I put in a n

SOURCE: TV shuts itself off after a couple minutes of being on.

One must be very careful of the quality of the replacement lamp. Many of the cheap 'deals' on the web for replacement lamps are substandard. I always recommend that replacement bulbs be the original manufacturers bulb.

SOURCE: Television suddenly turns off.

Try to get a firmware update. THis happened to me and I got a firmware update from Mitsubishi and now all ok. Call Mitsubishi

SOURCE: have a mitsu wd-52631 - get message

Well....the reason you are getting an "airflow message" is that there is a thermal sensor on the BACK of the lamp cage, and the connections on it get to be "intermittent" after awhile...and when this happens...the computer thinks that the lamp is overheating due to a dirty filter or fan--and shuts down the set.

It is a small, white plastic sensor, with 2 wires on it, that go to a connector and it has a black and red wire(usually) in a twisted pair that connects to the sensor connector. The connectors need to be REMOVED and the sensor HARD-WIRED (directly connected to) the other pair of wires. IF you have done some electrical work before...this is easy. You only need about 3" of spare wire to patch in between the sensor and the other connector, after you cut the connectors off. BUT...if you do NOT have repair experience...I suggest you call a COMPETENT, FAIR tv shop in your area, if you do not have a service plan...and tell them you have a mits. set that needs the "airflow sensor problem" repaired . this CAN be done -in-home, in about an hour or less, and for under 300, including service call.

SOURCE: Brand new mitsubishi wd-65c9. Pulled out of box

It's a possibility that the lamp is bad. I don't mean to insult your judgment, however, as a professional tech I would have never purchased a DLP set. They have been headaches for the manufacturers as well as us techs since they hit the market. If at all possible I would return it and purchase an LCD set.

SOURCE: Mitsubishi wd 65733: new bulb, 1 month ago, worked

The only thing that could cause the yellow light to blink after the new lamp is that the lamp lid or access door is not placed correctly or there might be some debris between the door and the door seat to where the door sensor switch is not being activated or the switch is erratic. Try using some compressed air to clean the switch and the door seat, that might do it for you. Thanks!