Lately, my panasonic PT-AE100 has started show a faint vertical strip of purple "haze" down both the left and right edges. The rest of the image has a yellow-ish tint. It's not that obvious until you look at the white screen in the service menu but now i know it's there, it's driving me nuts. I have 985 hours (mainly in low mode) on my current lamp!!! Is this normal for an LCD?? Will a new lamp fix this? Is my projector faulty? Is it caused by dust on a panel??? Is there anything I can do to correct it??