Intermittent green tinted pictures (both indoors and outdoors)

I have had this DSC-T1 camera for several years, and have been satisfied for most of that time. Recently, it has an intermittent problem where several pictures taken sequentially (sometimes even over several days) have a greenish tint to them. The LCD shows good color both before and after the picture is taken, although the "auto review" image shows the green tint, as does the downloaded picture. It appears to occur without regard to light level (i.e. both indoors and outdoors, with and without flash), and can be preceded and followed by hundreds of pictures with proper coloring. I have several examples, where pictures taken within 3 minutes of each other, with the exact same camera settings, of nearly the exactly same subject result in one good picture and one bad picture. I have reviewed all of the picture properties, and the only difference appears to be in the Exposure Time, although that doesn't always appear to be a good indicator of the resulting picture quality. (In one case, exposures of 1/250 and 1/50 both resulted in bad pictures, while an exposure time of 1/200 resulted in a good picture). This appears to be some kind of hardware failure of my camera, but I'm looking to you for recommendations or diagnosis.