I have had my tv for about three years, the picture started to pulse dark then light dark red,, and no more. I read that it must be the bulb. I put
in the bulb and there is a loud humming noise from within the tv, it is not
the fan,, and the bulb will not light. I checked all of the connections and they are not disconnected,, the front three lights are lite and when i fire up the tv, (i am holding down the blue switch) the lamp light comes on and the humming sound starts. I thought it might be a wire hitting the exhaust fan
but it is not... is this a ballast? or something else?
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Check if it has a scrambled image on all sources ie - DVD- VCR - cable/satellite box. Since the PIP is normal it sounds like the signal source is bad.
Post back with more info about your set up (what's hooked to your TV) if you need more info
i have had this happen to me several times in the field, and if it is what i think it is, you are not going to be happy =(
inside of a DLP type TV, there is a device called a 'color wheel'... it is essentially a disc made up of different colored glass that spins really fast. this disc has 3 or 6 (depending on make/model) pieces of colored glass like pieces of a pie affixed (read: glued) to a hub.
what happens sometimes is that one of the pieces of colored glass flys out of the hub, and causes a massive unbalance in the spinning wheel, which causes the hum/vibration, and since the colored glass is missing, the colors will be all messed up.
if this is what happened, then your television will require a new DLP engine.