I have a 73" mitsubishi dlp tv (WD-73638) Tv was working just fine. Put it in storage for a yr. Just got it out last night. Plugged in and has a steady green light but no picture or sound. Tried unplugging and holding power button for 20 seconds and still not working. Even reversed this step and still the same. Left unplugged over night and this morning the same thing. What could be the problem? Green light stays on and steady for about 3 minutes then clicks and turns red.