Christ udwig can you give more detail or specific model. I am using Hitachi superscan 753 from year 2000 till today september 18 2018, bought brand new, few 4 to 5 horizontal lines show up around 4 to 7 years of usage now about 8-10 lines. Average usage 8 to 15 hours, was for warcraft 3 and Dota games sometimes 20 hrs of gaming, now web browsing, youtube, online movie, regular Ms office, pdf basically not gaming. After about 4yr I am waiting for it to stop hopefully it is not out live me or my eyes. So any CRT design engineer or repair refurbish person who can tell how many year more can it last? 10 years ago I've prepared an LED to replace this CRT but 10 years more years had passed. If only Hitachi marketing would bought this back from me as proof of quality good product or running antique, but no fat chance their marketing group losing it niche.