I purchased a Mitsubishi HD new in 2001 All pictures are now blue and green The red silicone cooling jell tube is no longer lit up. It looks like you can take the tubes out. Please advise if this is possible and cost efficient. Not sure model number

Does the picture look like this?


If so I believe your CRT liquid coolant has gone bad and needs replaced.
How to diagnose bad CRT Coolant:

Note: This problem will only affect the GREEN and BLUE picture tubes. The RED CRT is never affected, because the wavelength of the red light does not promote this algae growth
General Symptoms: Washed out, blurry picture, red portions mostly OK, GREEN images have halos, BLUE portions of images may have halos or be missing entirely.Turn the color level control all of the way down and remove the screen and/or the cabinet that contains the mirror. (different for different models) Do not turn the set off or the color level control will reset to preset levels. Look directly into the picture tube lens while the set is on. First look at the RED CRT. Observe the scan lines in the picture. These same lines should also be present in the green and blue picture tubes.
After looking at the RED CRT for comparison, look into the GREEN or BLUE CRTs. If it is contaminated, it will look like there is a layer of film that you have to look thru to see the picture. There may also be swirls and other various contaminates forming. If it is not as clear and sharp as the RED CRT, it is contaminated, and you should change the coolant fluid. IF you wish to tackle this I will supply more information and instructions. This task is medium to hard for non trained people.
Let me know if you wish to get the instructions on changing the fluid.

Is this a CRT (picture tube) or LCD, DLP projetion set. DLP and LCD are lamp driven CRT have three picture tubes (red green and blue). You can tell by looking at the back pof the set if you see the glow of white light than it's a LCD or DLP. Lamps can be purchased at "bluestar international" ($100-$400) (google it) and CRT's are not worth replacing (over $300 each_)

no your optic block is going south u need a new light engine big bucks

You can probably purchase a smilar set on Craig's list for $300.00, at least that's what they go for in the Austin Texas area.
A new tube may be too expensive and difficult to replace.

This set does have a lamp, it utilizes 3 picture tubes (red, green, blue) The tubes are not available as new any longer. It is recommended to replace all 3 after the reaches 5yrs of age because a new tube will over drive the others in brightness but it is possible to only replace the defective one. You can try Tritronics at 800-638-3328 for rebuilds.

im just going to assume you have it hooked up wrong, call a TV person and they can come look at it, its really hard to do this kind of thing over the internet

you have to make the alignment for all 3 formats....standard....1080i...and 480i

Check settings first to make sure no one changed anything out of the ordinary. Are the shadows that of a color or darkened shadow? It could be out of convergence, which can be corrected in the menu - or it could be low quality video cables to. Also, if there is no green, does a white color show up when you're in a menu mode (Red+Blue+Green = White Image)? If so, then the green picture tube is working and it's just a color adjustment, otherwise you may have to invest in a new green picture tube.

You have a bad blue picture tube. If you replace it the red and green will be weak and probably go sooner than you think. Everytime I had to replace a tube in a sony projo tv i had to replace all 3 picture tubes at the same time. It's very expensive if you don't have any type of warranty coverage.

C-Dog

Well if there is orange I would think you lost your green. My question is this point are all three tubes lit up. That would give me clue what direction to send you in.