Won't come on unless cold and won't shut off (by 3 users)

I have a Sony KF-42WE610 that has to have been off for several hours before it will power up. The green ready LED will just keep blinking at a steady rate and sometimes the sound comes on but the lamp doesn't. I replaced the lamp 6 mon. ago and it has no more than 200 or so hours on it. I don't get any red blinking codes nor does the lamp LED come on. After I let it cool down an get it to turn on the picture is bright and clear but when I turn it off the red LED comes on and the screen goes blank to a faint blue,the sound goes off but not the lamp. It used to do this for less than a minute until it cooled down but now it just stays this way. I have to unplug it to turn the lamp off. I have downloded a service manual but I don't get any of the diagnostic codes that would indicate the problem.
I just had a new Dish Network 622 HD receiver connected to it and the problem started soon thereafter. Could this be related?