is my cinema display about to die?

[shaktimage]

just bought a used 23" cinema display. It came with a reddish COLOR cast. So i complained to the seller who shipped me another one... with the same color cast! I live in 2 different locations, i already use that same screen in one location, this is for the 2nd location. My other display don't have that color cast, i use it with a macbook pro. SO WHAT THIS RED COLOR CAST MEANS? the color cast start 4mm from the edge (so there is a kind of white frame around) and is not uniform; more reddish on the edge, less in the center. Calibration won't help. any comment welcome! Thanks