EVRYTHING IN THE PICTURE HAS A GREEN TINT TO IT, AND IT IS GETTING WORSE. I HAVE REPLACED THE BULB ABOUT 2 YEARS AGO WITH AN AFTERMARKET PART. WHAT COULD THE CAUSE OF GREEN TINT BE? AND IS IT WORTH REPAIRING?

Sounds like a Sony, if it uses a lamp the green cast is most likely the optical light engine in the set---major part.

AKAI PT50DL14XSMS - LAMP INDICATOR (GREEN) FLASHES ABOUT 20 TIMES - CAN HEAR FAN RUNNING AND LOOKING THRU LAMP GRILLES CAN SEE BRIGHT BULB LITE - NO PICTURE COMES ON - AFTER ABOUT 30 SECONDS EVRYTHING SHUTS DOWN

Find your reciept then call mitsubishi . if you purchased it less than 3 years ago mitsubishi will pay to have the expensive light engine replaced.

This usually is an issue with the Video Board. I recommend you replace it beofre this gets worse.

Fuzzy,blury picture in CRT tv tube.Tv in long use not repairable.Tv tube is dying,it junk.

My Sony KDS 50 A2000 is 17 months old. Its the 50 Inch SXRD projection model. About two weeks ago the screen developed a green tint with cannot be tuned out, then a few days later the message began to appear on the screen that the bulb was nearing the end of its life and must be replaced.
Fortunately I have the Circuit City extended warranty.
I called and within just a few days a serviceman came out and replaced the projection bulb.
The Result: No change in the picture, the green tint remains on all channels, so I'm awating the next service call. Under the service warranty they have the option to repair or replace this set. If indeed this is the light engine (optical block) which I suspect and its going to cost $1,000 or more I may be looking at a new set.
When it works this is a great TV, but I have had three Sonys now including two other standard CRT models and now this one joins them in the junk heap, the other two also bit the dust after just about two years. Is it time to give up on Sony?
I know they have a class action suit on a similar model for this same problem. Caveat emptor

If you are in warranty contact Lg electronics since they own Zenith. I was having similar difficulties and they are sending me a replacement tv even though I am out of warranty by 3 years.

I'm not sure but I think this model uses an integrated graphics card which would then involve replacing the entire motherboard.

It may be that the screen backlight is getting old - they often age by showing a tint, usually it is pink but I have seen them go greenish.

Try an external monitor connected to the laptop via the VGA d connector. If the picture on the external monitor has a good colour balance then it is probably not a faulty graphics chip, and likely to be the laptop screen.

I guess it's missing blue. Even if you see the blue crt working it's not enough and focalised. replace the coolant in it and also check if you have some coolant leak on the crt pcb.