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.
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.
Now days the tv's are not expensive as they used to be however the repair charges have not changed much therefore you will be looking at more than half of the price of a new one.It might be better to invest in a new set.