Can a picture tube go bad if the TV is not used for 5 years? Just brought this one out of basement. It had never even been taken out of the box.
Has sound but the picture went the day after it was set up and turned on.
Hi DiBd. Some electronic components in a tv can go out of tolerance during long periods of inactivity. I think that's what's happened to your set. Some component in the video section of your tv has given up.
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If its 20 inch its not the model in the photo here, aside from that if something serious is wrong cheaper to buy a new set than fix this one, I am willing to help if know model and whats wrong with it.
If there are lines on the screen [parellel lines across the screen horizontally, at about an inch or so apart], your tv needs screen adjustment. Its screen voltage is now high. It can be brought low by adjustments. There is a screen adjustment control, usually integrated with Line Output Transformer. If you know, you yourself can adjust this. It is an internal adjustment and need to open the back cover of the TV. Don't use your TV for long time without rectifying this problem. It may get picture tube damaged. The electron guns inside the picture tube neck will get red hot and its emmision will be reduced.
You TV has a bad CRT, a red CRT by the sounds of it. This TV is rather old, perhaps 11-13 years of age? Your TV has given you many years of service and I do applaud you for the care you have given it and the TV for it’s reliable in your home.The trouble you face with a rear projection CRT set of this age is that you can’t just change 1 CRT tube and expect it to be reliable and produce a good picture.All 3 tubes should be replaced, as they have all aged the same.The lives of these tubes are only about 7 years.A tube is not any easy or inexpensive repair on any RPJ TV.When you are faced with the cost of 3 tubes, which may not even be available in the market place… You should consider retiring this old friend and keep the manufacture in mind as you make a new purchase.
First of all,this is a major labor intensive repair on Philips TV's changing the blue CRT because the new CRT does not come with the coolant that is sealed between the lens and the tube.If you have never done this type of repair before you should not attempt. Changing the convergence board is one thing (you can solder in two STK392-120 IC's and repair the board instead)
but changing the CRT's can be a nightmare.If you are brave go to PARTSTORE.com and get the parts $600+ (I would order the service manual too...you will need it)
This problem sounds like a short inside the picture tube itself unless a driver transistor failed that drives the red gun in the CRT. You may have to take it to an authorized repair facility if the picture tube is still in warranty.