I have RCA Scenium Model #HDLP50W151
Sound, but no picture---Thought it was the lamp - Replaced and "nothing" ---I am thinking it is the color wheel --When I press the power button, sound comes on immediately. After about 20 seconds, a wheeling sound, which last about 20 seconds and stops. As it is stopping, the power button flashes 5 times. In 20 seconds, wheeling starts again, and same scenario over and over. Can someone tell me if I need to change the color wheel? Local TV repairman told me that all of the color wheels available for my television are rebuilt, so it's not worth fixing. Can anyone answer my questions?