Mitsubishi wd-73727 have new lamp bulb;did not

Part 1 Mitsubishi WD 73727 DLP Color Distortion Distorted Fix Repair V28...

Lamp light blinking yellow means lamp door not installed.
Lamp light solid red and TV shut off is lamp error (did not light.)

Lessing of brightness on a DLP set is a sign of imminent bulb failure.

A new bulb is in order.

If you tried a cheap bulb then that might be the problem as some of the bulb carrage may not be complete4lyto spec. I had one that was close but there was a gap between bulb and where it fits. I went with a bulb dealer that had I believe a 1 year warrante and I have had no problems. I had a 73838 tv set.

It could be. Do you know if the previous owner ever changed the bulb? If not you may have to replace it. The bulb usually costs around 160ish. I would try it and see if it helps the brightness.

This unit uses a DLP (digital light processor) chip and if this starts to fail then you will get spots appearing on the screen. The DLP chip will need to be replaced.

This cable attaches to the lamp,reach in behind the lamp case in the tv and hold it in place and reinsert the lamp make sure it plugs into the lamp securely.

Using your remote, click the "video" button (mid area, Right hand side) and adjust the brightness, contrast, etc., to your liking. Only you know what you like. If your picture can be "plenty bright enough"...then just make the necessary adjusts to whatever looks best to you. If your picture is "very dim" no matter what the video settings are, you need a complete cleaning of all lens, mirrors, and screen...and possibly a new lamp.

Did your replace lamp come on the screen or did you lose picture? Just because the LED indicator suggest replace lamp it doesn't mean it needs it. If your pix was dull or loss of brightness then replace it, if not then just reset your lamp timer, check your owners manual for instructions.

Had the same problem. Service replaced the lamp engine. It did help.