Mitsubishi projection tv picture and sound turn off but the power button remains on with no picture or sound turn tv off real quick and then back on and works for 2 mins then turns off again what could be te problem?

Here's the basic troubleshooting:

1. Make sure that no front panel buttons are inadvertently stuck in an "engaged" position.
2. Disconnect ALL devices from the TV.
3. Press the SYSTEM RESET button and hold for 10 seconds. Proceed if the problem still exist.
   
4. Press and hold POWER and MENU buttons simultaneously for 20 seconds. Proceed if the problem still exist.
5. Unplug the TV from it's power source for various times, ranging between 5 minutes and 24 hours.
6. If it still shuts down, press the DEVICE and MENU buttons on the front panel simultaneously and hold it for 5 seconds to activate the Error Code Operational Check. The status LED indicator will then flash denoting a two digit code.
   
7. Count the number of flashes then pauses for about a half second then flashes again. The first number of flashes indicates the first digit of the error code and the second number of flashes indicates the second digit of the code. For example, if the error code is "35", the LED will flash 3 times, pauses, then flashes 5 times. The error code is repeated a total of 5 times.