What does the yellow blinking light mean on Mitsubishi WD65837

Hi,

Here is a whole list for you :

Mitsubishi Blinking Codes :

Constant Green - TV is Powered On
Constant Red - Lamp Failure
Constant Yellow - DMD temp is very high
Blinking Yellow - Lamp cover is open
1 Red Blink, 6 Yellow Blinks - Color Wheel Failure
3 Red Blinks, 4 Yellow Blinks - Lamp Failure
3 Red Blinks, 6 Yellow Blinks - Exhaust Fan Not Working
3 Red Blinks, 7 Yellow Blinks - DMD Fan is not rotating
5 Red Blinks, 7 Yellow Blinks - Ballast Problem
6 Red Blinks, 6 Yellow Blinks - Lamp Missing, Bad Cable between lamp and ballast

And the Lamp cover must be here somewhere in your TV :


For more you can refer to the below link :
Mitsubishi DLP TV Blinking Code Errors Explained Overview of Each...