I have a samsung dlp model hlr4667wax, when first turned on it makes a whistling noise then a buzzing noise any suggestions?

Hi,If you are experiment color distortion,pixilation,white dots,vertical or horizontal lines it might be time to replace the DMD board.

it sounds that u have a color wheel problem my friend

Bearings in color wheel going bad and needs to be replaced. Call a local tv repair shop on pricing and availability of color wheel for your model and chassis
number.

It is likely the color wheel motor making noise

Check this link
http://www.jangro.com/electronics/samsung-dlp-replace-color-wheel/

If it helps be sure to vote/rate me Thanks

This TV is horrible. I have the same one and not even a year replaced the light bulb twice. Very disappointing for a Samsung.

check your uhp lamp.

COLOR WHEEL OR COOLING FANS

This is a possible fault in the power supply, and can be a problem with some decoupler caps on some of the boards. The vertical bars and unstability are usually attributed to having high frequency noise and or clocking pulses crosstalking on to the power distribution lines that run through the boards. This can be switching power supply noise, or cross-talk from clocking pulses.

Another thing that can cause your described fault is unstable clocking between the devices that are reading and writing to the data busses. There are a number of data busses running through the set for the boards to be able to communicate with each other.

The tech will use the process of board swapping to service the set, and then do the adjustments as necessary to make sure the new boards match up.

Yes... DLP sets are fairly expensive to service!

This is my personal opinion. If the set is out of warranty, I would change for a Plasma or LCD set. If you compare the performance of these to ther DLP, the difference is very big. From what I am seeing from a service point of view, the DLP's are lower in reliability.

Jerry G.

A stuck color wheel can cause this exact problem.

I HAVE A RCA 50 HDTV DLP MODEL #D50LPW134 IT MAKE A BUZZING SOUND AND NO PICTURE i CHANGE THE BULB AND STILL NOT WORKING.

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Ken