i have a samsung dlp 5687w, i have owned it for three years and it is starting to shut off on me. the picture quality is still like new, the only prob is it shuts off whenever it wants too. it does not turn back on, but when i turn it back on it makes a buzzing sound.. when i turn it back on it takes a couple of seconds and comes back on. it might shut of again in 5 minutes or 1 hour it varies, and help would be great thank you!!!!!!!!!!