My mitsubishi wd-73737 has a picture and no sound. The sound would come back on after a while, but now there is no sound at all.

SOURCE: Mitsubishi WD-73732 TV

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.

michtech

SOURCE: Mitsubishi WD-52525 52-inch DLP HDTV ywllow warning lamp light

that means your lamp it is getting to the end of its life.
sometimes even if the lamp still good the TV will send you that message because that timer is closed to 5000 hours

What you can do is open the lamp door, closed again and the tv will ask you if you replaced it the lamp, and just say yes and that sign will go away

or just simple replace the lamp. 915P020010

SOURCE: Screen Removal - Mitsubishi WD-62527

SPEAKER GRILLE Removal
Pull the SPEAKER-GRILLE away from the cabinet to remove.
SCREEN-ASSY Removal
1) Remove 10 screws (a) from the upper cabinet rear cover (3 screws on each side and 4 screws across the
top).
2) Remove screws (b) along the bottom of the SCREEN-ASSY (8 screws on 52 inch models, and 12 screws
on 62 inch models),
3) Unplug the LL connector to the front CONTROL-PANEL.
4) Lift the SCREEN-ASSY up slightly and then pull away from the cabinet.
CABINET FRONT DISASSEMBLY

SOURCE: problems with mitsubishi WD 65737

problem with mitsubishi wd65737. thought the bulb was bad, bought a new bulb replaced it and now the screen doesnt want to come on. light on the front of the tv turns green, you have sound but no picture then the tv turns off the light on the front is now steady red. resetting the sytem worked yesterday but not today.

SOURCE: Mitsubishi WD-62531 Replaced lamp 2 weeks ago.

i have a mitsubishi wd-62531 modle i replaced the buib with a phillips bulb wich the salesman says that my old bulb crosses over too now the picture seems to be to dark....could the bulb be not bight enough