I have the same problem. Please advise how to fix it.

If Sony KP-51ws510 it is an common issue with the picture tubes but there may be a simple way to adjust something in the set to correct this--these had problems with the 3 picture tubes where it can go to excessive red, green or blue.

Confirm model and issue and I will assist.

It only requires a screwdriver and the back does not have to be removed in this case.

Convergence ICs and CK all Pico Fuses around ICs they will look like resistors but will be Green or Yellow 5amp, 6amp, 7amp Fuses. Big Black ICs they will have the PN# on them
ICs STK392-110 use 120s Mats 1-800-628-1118
TV Repair Shop $255.00

the sony type 1 convergence repair kit from www.tvrepairworld.com should solve the issue. The kit contains the parts and the CD with instructions.

This is a common problem. Its called a convergence failure. You can get all the parts from www.TvRepairKits.com

Symptoms:

• Screen Looks 3D
• Colors wont align
• Screen may look distorted

You can see some examples and find a fix here...

http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

This is a very common failure on Projection sets. Its called a convergence problem.
You may have one or more of the following symptoms.
Screen looks 3D
Colors don't line up
One or more colors can't be adjusted when using the convergence menu.
Screen is bowed or warped.
No Audio / No Video - Makes Chirping Sounds
You can see some examples and find a fix here...

http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Check your convergence, Using your original remote go to the Menu, in the settings select convergence, try to align the colors to each other.

Solution:
You have a convergence problem. Here are some of the most common symptoms. 

Screen looks 3D
One or more colors can't be adjusted when using the convergence menu.
Screen is bowed in but stationary.

Here is a quick test....

Using your original remote go-to the tv settings then goto the convergence section.

Try to adjust the red and then the blue convergence.

You should be able to move them up, down, left, and right.

If you can't move them in all directions your convergence chips are bad and should be replaced. This is a common problem. 

>>>Solution<<<< 

You need to replace the convergence chips and convergence resistors. 

Check the site www.TvRepairKits.com.
They have put together a kit for your exact model. The kit includes a photo instruction guide, original Sanyo STK chips, convergence resistors, etc. Everything you need to fix it yourself. 

Replace STK-392-110s or 150s upgrade with 180s replace both ics.

There are resistors that need changing and maybe small fuses.

Sounds like convergence issue....Can you describe " colors
go nuts"..........If red green or blue separate, replace STK392 IC's
located on large heat sinks.........T.