, Beijing Samsung TV after-sales service phone Technical source; Beijing Samsung TV after-sales service phone http://blog.tianya.cn/blogger/blog_main.asp?BlogID=3685266. Samsung TV repair Q&A; the lifespan and aging symptoms of the cathode ray tube The average lifespan of a cathode ray tube is 10,000 hours. Its lifespan depends on: ① Consumption of the cathode oxide; ② Attenuation of electron emission. Symptoms of cathode ray tube aging are: ① Cannot get enough brightness even when all adjustment controls are set to maximum value; ② It takes a long time for the TV to form an image after being turned on; ③ Image flickering; ④ Image color is not clear when contrast control is set to maximum value.