I have a Phillips Magnavox HD Tv Rear Projection Television and the picture looks greenish and reddish and is blurry on the text of the screen? please help.

If your TV looks 3D, warped, or distorted it likely has a convergenge problem.
If however it just looks dull, washed out, redish, greenish, or blueish or if it looks like objects on the screen have halos the fluid in the lens has soured.
You can search google for parts or you can get the parts with repair instructions from sites such as www.TvRepairKits.com

The convergence ICs and resistors need replacement. The DPTV305-345 convergence repair kit works for most Phillips rear projection Tvs. The kit contains the two ICs 12 resistors and the CD with detailed instructions
http://www.tvrepairworld.com/

Thats the classisc symptom of a phillips which needs the CRT coolant replaced. You can get the Phillips CT coolant replacement kit at the following link which has the Coolant and the CD with complete instructions. Its listed under the Phillips Repair kit category.
http://www.tvrepairworld.com/

The convergence output IC's need to be changed. A very common problem with all projection tvs.

You can find a replacement Philips/Magnavox fresnel screen, in stock, for this model (51MP392H/17) at this following link from a major parts distributor:

Philips / Magnavox 51MP392H Replacement Part Fresnel Screen

And here's a link for the Lenticular (middle) Screen, if needed:

Philips / Magnavox 51MP392H Replacement Part Lenticular Screen

not showing a picture are making a sound.

That model is famous for having bacterial contamination in the CRT coolant causeing halos, and dim pictures with bad overall color issues. You can look into the lens of the CRTs when the set is laying and if the coolant looks cloudy or has any growth there you will notice it right away, and changing the coolant will restore color, clarity and brightness.

color is reddish and dark

coolant fluid on picture tube may be contaminated replace it an setbe ok (this is a technician job)

power supply problem .the cherps are the power supply ossiclating and trying to produce . soon you won't even hear that