65" 1080 mitsubishi tv model# WD-65733 wont turn on

bad lamp

CONTACT MITSUBISHI TECH SUPPORT, THEY SHOULD BE ABLE TO GIVE YOU AN IDEA OF WHERE THE PROBLEM IS WHEN YOU TELL THEM THE ERROR CODE, THEN LOCATE A HONEST TV TECH FOR A ESTIMATE.

I'd just replace my lamp just three days ago and the problem still
exsist

Check this possible answer I provided and it worked for another similar set:

http://www.fixya.com/support/t12296849-turns_off_shortly_after_turn?mt_f=viewFull162

Mitsubishi's troubleshooting page:
http://support.mitsubishi-tv.com

Click on the "GO TO TROUBLESHOOTING >>" link.

Here are Mitsubishi's (3) downloadable PDFs for the WD-65733:
http://support.mitsubishi-tv.com/documents/WD-65733

Hi! Your lamp is nearing the end of its life and needs to be replaced. You can do this very easily yourself and your manual explains how to do it. It's two screws. Order it directly from Mitsubishi. The OEM lamp costs $249. Do not buy an aftermarket lamp from an online retailer. They are of inferior quality, normally do not come with the cartridge can damage your set and they usually cost as much after you add the cartridge.
Here's the link for Mitsubishi.

WD-65733 Manual.

You need to reset the lamp timer. Should be in the manual or else download the PDF from the mitsubishi website

check your lamp door interlock switch.

What it sound's like is that the lamp ballast is the problem. Buzzing sounds like when the power is first brought to the ballast it has to ramp up the voltage to get the lamp to light, then the voltage drops back down when the lamp is lit. Sounds like the lamp ballast isn't ramping up the voltage the way it should. May have to replace it. A good service shop would be able to do this for you.
Blessings,
A/V Media Guy

When tv goes out, press the menu and input buttons. The green light will flash with a 2 digit code.