Lost color, loud buzzing sound HLP4663W

My dlp sometimes like every 6 months just freezes white pixeles black like a negative but crude anyway i shut it off then restart it makes a humming noise like winding.then stops and restarts. i try to watch something and it does it again so i heard something about the vents need to be cleaned behind the tv.so i get the vacume cleaner and **** the dust build-up on my back vents really good. problem fixed.tv works fine.try this before changing out any parts.the dlp simple needs maintence because of dust build up.

This can be the colour wheel assembly, or the servo drive board, or a fault on the circuit board that does the sync processing for the colour wheel.

You will have to have the set properly serviced.


Jerry G.