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While i don't recall that particular pro lemme alot of Toshiba sets had an issue with the ballast boars. Basically over time the solder connection s get hot and cool so much that the joints Crack and breal. The ballast board may need to be resoldered. If you choose to try this yourself...be advised there are very high voltages inside a tv that can seriously hurt or kill you.
The answers above are correct. It's either the lamp or the color wheel. Testing the lamp is pretty straight forward. Use an Ohm meter to see if the it's filament has continuity. It's unlikely that a good color wheel would fail immediately after changing the lamp. Look to see if some wiring is out of place and rubbing the wheel causing the noise you described. A jammed but otherwise good color wheel would cause the TV to shut down and display an error code.
If its a DLP with a high pitched or even fan like sound it is the color wheel--Mitsubishi does not sell them as a part---you would have to replace the entire light engine (expensive and may not be available any more on a older set) .
My Toshiba dlp 62hm116 was used for 3 months then stored for 2 years, I turned it on yesterday and it makes a loud grinding noise which I think is probably from the exhaust fan area and the picture is black except white at both vertical sides. It worked fine the last time I used it 2 years ago. Any ideas?