After half hour no color - Mitsubishi WD-73732 73" Television

Try replacing the tcon board

power supply dry soldering or bad capacitor

I'm having the same issue. Any luck wtih resolving this issue?

If you hear any winding, whirling or screeching noise (Color Wheel symptoms)
If there is any vibrations in the TV (Color Wheel symptoms) you would need to change the color wheel.

I have two problems. Either it won't accept a print job or when it is printing it stops when it is going through the job intermittently. Like for an hour it won't continue then all of a sudden it prints one page then a half hour later another page etc. It is so frustrating.

there maybe cold solder around the chroma section, or in the CRT board....

This is usually caused by the tuner which loses the chrominance part of the NTSC signal. Your did not say how you have it connected but it you try using a composite video input (yellow jack) and get the color OK than it must be the tuner which is not cheap but is worth having replaced.
Hope Ya Fix it!

Try to replace the Logic board.

Since this happens after the set warms up, I would check for bad solder connections or capacitors on the convergence board. If the problem was not readily apparent, then I would consider replacing the board, as I believe the replacement board has been upgraded from the original.