I was doing a search online to see what I could do with my Mitsubishi WD60737 and came across this forum and your problem.
My similar problem started a few weeks ago after having my DLP chip changed by my local Mitsubishi authorized service repairman. I was getting those white dots on the screen, and Mitsubishi provided a new DLP chip. The day after the chip was replaced my TV screen went black. When I turn the TV on the status light turns flashing green. When the light goes solid green, the TV is on, but no picture just sound. After about 30 seconds, the TV shuts down and status bar flashes red. While all of this is going on, I never hear a fan going. I thought it might be the bulb--even though the light was flashing red--so I ordered a new light. It has been two years since I changed the bulb. I was hoping it was the bulb, but when I put the new one in today, I got the same results--no picture and the TV shuts off in about 20 seconds.
I already paid $212 to have the chip replaced and $147 for the bulb from Mitsubishi. Those bulb prices went up since the last time I got one. It does look like the same bulb I bought from them two years ago.
When I do a check for the status code for a flashing red light--#61 is the code--"No LAMP-EN output from the engine to the ballast" it looks like a bad color wheel. If the J6 or J7 are loose is this something that can be fixed without changing the entire color wheel. I hate to spend more money on parts for this TV when their is no guarantee that it is going to get fixed.
Also is there any chance that changing the DLP chip has contributed to this problem?
Also I was never able to do the software upgrade for this TV and since the TV will not stay on any longer than 20 seconds there is no chance of doing that now. Could that be a problem. Mitsubishi told me to try to install the new software, but like I said, the TV won't stay on long enough for me to do that.