Mitsubishi WD-65733 no picture, electrical buzzes in series

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

It is probably the wiring. Try buying a new power cord.
If not than it is just malfunctioned.
Contact Mistubish
http://www.mitsubishi-tv.com/contact

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

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.

suggest replacing the lamp. when the lamps are reaching the end of their life the tv will take a long time to show a picture and you may see a drop in brightness. part number 915P061010 i would really suggest getting a mitsubishi original lamp there are alot of generics out there and they are junk. good luck

Lamp could be the problem or Ballast board that powers Lamp on. Encompass Parts Distribution visit their website and look up your Model#
If Problem is Lamp Mats has them for $99.00
1-800-628-1118

You need a new projector bulb. Google up your model and buy the best warranteed one you cAN FIND. Buy a "caged assembly" and not just a bare bulb.

Then unplug your tv and get a screwdriver. Follow your model's instructions and just snug down the electrical screws. Do not overtighten them.

Then consult your manual on how to reset the lamp timer so it knows you put a new bulb in and fires up from the first try.

Treat yourself because you've just saved yourself a trip from a repairman!

check your lamp door interlock switch.

No check for bad capacitors on Power supply board they will be vented swollen or puffed up on top.
Go to Encompass Parts Distribution and look up your Model number.

need to replace the inverter board also