We have an RCA 52" HDTV DLP projection. We bought it in 2006. We had a problem with the color wheel, then the bulb went out now it is not receiving a signal from the cable box. Any ideas on how to fix it? Is it worth fixing? We swtched the cables and the input but it still doesn't work. We can hook it up to DVR and watch recorded shows. We hooked another TV to the cable box and it works fine.