Half of the screen goes black

Try the soft reset with the remote: menu,1,2,3 and enter.

A couple of suggestions, if only on cable and using a box disconnect the set and box from power and after several minutes repower and see if a reboot helps.

The two models listed here both should also have a soft reset done with the original remote and the set on---Menu,1,2,3, enter.

The way that you change the color on this TV is thru the audio/video menu, under Perfect Color. It show you how in your owners manual on page 74. If you no longer have the owners manual you can downloaded it here http://www.mitsubishi-tv.com/pdf/ownersguides/WD-73732.pdf

Hi,
Unlike bulb, It is hard to find the ballast of your TV. I suggest you check it back, later at this website : http://www1.shopping.com/mitsubishi-tv-wd73732dlp-parts/products~FD-0~PG-3
Regards

check your screen back Light or get a working screen and test it or your screen flax is bad

Sounds like your lamp blew, need to replace it.

check output voltages on the power supl.

Around $750.00 for a new screen plus labor.

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/edwy_1a56970cf1ea4620

Is this a DLP or LCD projector?

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