Have a Mitsubishi WD 73737 problem is when turning on, starts normal get sound and no picture. restart a few times and picture eventually comes on but not as bright as normal. Just started doing it.

A replacement lamp ? partnumber 915B403001 maybe ? measure if its defect
On page 71

https://www.mitsubishi-tv.com/asset/file/owners.../C9-737-837_OG.pdf

Check your lamp. The popping sound was most likely the arc tube exploding. Make sure you only install a real Philips or Osram lamp. WD73737 Mitsubishi Genuine High Quality Original Projector Lamps now...

These folks have good lamps.

Have a look first at the lamp to see if it is intact.

Probably a blown lamp-- check your owners manual and replace the lamp

Lamp or temp light comes on it can be the lamp or ballast, if you change the lamp I would do the whole cage instead.

I've seen that happen on equipment that has automatic signal detection. Usually this option is available when connecting the equipment with an hdmi cable. The setting can either be on the television or the cable/sat box or both. You have to disable the automatic signal detection signal on both the television (if the television has one in the setup hdmi menu if there is one) and on the cable/sat box. Further you have to choose a resolution on the cable/sat box normally 1080i or 720p fixed. Disable the 4:3 override if there is one. Save and lock in the settings and you should be all set.

It's not the bulb. Google Mitsubishi WD-73737 blink codes. The blinking light is a self diagnostic tool and each blink code represents a certain problem.

This happened to mine had sound but no picture it was the bulb hope this helps...

my tv keeps turning off i have a mitsubishi wd-73737 what can i do to fix it?

buffer board or video pcb board