On my mitsubishi rear projection the dark colors flicker with the scene is in a dark background

SOURCE: Dark Screen and Blue Lines Arc Across Background

Hello!!

If the coolant is cloudy or has debris floating in it, the coolant will have to be changed and the lenses and crt face will need to be cleaned. Coolant can be ordered from any electronic distributer

SOURCE: dull dark picture on kdf-e50a12u rear projection

Depending how long you have owned it and if a Lamp was ever replaced, it probably needs to be replaced. You can check with SONY at
1800-222-SONY and see if they could sell and send you one.
Hope this helps,
Skyassoc

SOURCE: A Dark Bar at the top of the screen that looks pink against white

the light engine is defective if you have black bars that look pink.

SOURCE: My Sony Wega rear projection TV has green

I hate to tell you this but if your light enginge /optical block is bad you are Looking at just for Part $1,949.95 core refund is $1,300.00 Then part is 649.95 Encompass Parts Distrubtion has 23 of them
1-800-638-3328 Chances are it is your Light Engine!

SOURCE: My Sony KDF-60Xs955 rear projection has a blueish

This is a common occurence on this model TV. Unfortunately this is a big problem and will cost you a lot of money (>$1000) to fix it. If you call Sony and tell them about this problem they will offer you four different new brands at a reduced cost as long as you waive them of any future lawsuits.

I had the problem and if you search the net, many of them are going through the same issues.