The tv already have new lamp but the color is to dark

It sounds like the main power supply has a bad capacitor. its a typical issue with a lot of electronic. look on the main power board that the outlet cord comes in to the TV and check all the cylindrical components for swelling, leakage, or singe makes.

your dmd is bad

a new lamp is possible or even the ribbon cable from the wheel to the engine may be in backwards.

The tv LED light on the tv front bazel frame face have the word "LAMP" light up or blinking?Yes.The tv projection lamp been inside this tv like 1 1/2 or 2 years already,tv used it everydays like 4 or 5 hrs daily?Yes.Than the tv projection lamp life are over,that why it dim picture tv now must have it tv projection lamp to be replaced.

I'm sorry that the pictures on the TV screen is black. Based on the information you have provided, it appears that the issue is with the Lamp itself. The lamp of the TV may have to be replaced within two to three years depends upon the amount of usage.
If the screen becomes dark, the color looks unsual or the LAMP indicator on the front of the LCD projection TV flashes, it is time to replace the lamp.
Thanks for understanding. Please let me know if you require further assistance in replacing the lamp of the TV.

get it demagnetised from the service shop. A simple 2 minute procedure.

how old is the lamp , if is about a year old need a newone

an original lamp (original brand name of the tv) can be "alive" there for some years. if you want to buy a tv an suspect that the one is good or not just turn around that area one or a couple of weeks if still working with a great bright and crispy color is good symptom> (some re-manufacture lamps just work a couple of hours even new)
The lamp's life is a question mark in this technology (optimistic ingeniers (brands) count these hours as 1, 2 ,3, (thousand hours) (actually some manufactures count the time ""it is a simple timer the microprocessor can manage pretty well, but is not the mean of a good o bad lamp""
but i recommend my customers to have a spare lamp (just in case you are watching a beatles show) and blowns, you have it in the garage and (consulting the user manual) you change it a as regular bulb in your house.
But the lamp life "and this is the tip": (only two states)

1. the picture tends to look dark or dimm (is logical because the high intensity the lamp works tends to create a tiny black surface on the heater and tends to consume more current and the answer is a dark picture as i told you already.
2. the lamp blown (of course the tv cannot work and the LED "lamp" turns on or keep steady on the front panel with a complete dark screen.

Lamp is cause of dark image in your tv. Lamp indicator will flash when lamp will be dead.

Unfortunately when there that dark there isn't much you can do to make them brighter but get new ones and at this point you may want to consider to replace the whole thing.