A friend just got a 19" CRT dirt cheap and it works great except after it's been on a long time the color turns greenish. He'd really like to fix it himself if possible, but neither of us are electricians (or anywhere near, lol). The guy who sold it to him says it's a bad resistor and normally he repairs them and sells them for a lot more, but didn't have time with this one for some reason. Anyway, can anyone out there help, or is this something that'd just have to be done by a pro? I took a couple electronics classes in high school and understand electrical jargon if anyone can help. Thanks!