I have an older Sanyo 36" cathode ray tube tv. It is used only occasionally. Now it will not turn on by the remote or by the button on the front of the tv. It has been problem free until now. How can I get my tv to turn on?
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There is no picture tube in a modern flat screen TV.
And unless it's physically broken, it's usually something else that has failed and not the screen.
A picture tube is a CRT (cathode ray tube) that sends electrons from the back to the front to light up different color phosphorous dots.
A modern flat screen TV on the other hand is LCD (liquid crystal display) that turns on and off to allow backlighting through multi colored filters. (LED TV also uses a LCD screen, the only difference is the backlighting is LED and not fluorescent lamps.)
If your TV is older than the URC-4220, the code should be 0154. (The universal remote generally can only control devices that were released about 6 months or more before the remote was programmed.)
To program the remote, turn on the TV manually. Then press the TV button on the remote once. Press and hold Set until the LED blinks twice. Release the Set button at that point. Enter 0154, check if the LED blinks twice again. If the LED blinked properly, point the remote at the TV and press Power. If the TV turns off, this is the correct code. If you take too long between steps, the remote may leave the setting mode. If the LED didn't blink, start over from pressing the TV button on the remote.
TVs that use cathode ray tube (CRT) cannot display the correct aspect ratio for movies and modern TV broadcasts unless it is in letterbox form. Unfortunately most of the older CRT TVs do not have a letterbox setting.
Usually in a Cathode Ray Tube Television a blown fuse is either something is wrong in the high voltage power supply section or the flyback transformer is bad, or a bad horozontil output transistor.
Since a CRT (cathode ray tube) TV is an analogue TV (has a tuner) the only method of watching digital channels is setting it up as a monitor (channel 3 only) and using a cable box that takes digital and broadcasts analogue through the co-axial cable wire.
If you can control the TV by using its front panel controls, and only remote control is not working, the fault may be either to its remote control handset or to the remote sensor inside. The remote sensor is a small component, having only three solder terminals and will look like this. This is the component inside the TV which senses the infrared rays emitted by the remote control, and convert it to digital signals, and send to the microcomputer section circuit to process. This component can be located just behind the infrared remote window at the front panel of the TV. You have to open the TV to access it, and to replace it. Just check your remote for its infrared emission, before going further. Just get more details about how to check a remote control from this site named 'Electro-help'. Pull up older posts there. Just check this link, and locate the site named above.
Pull the back Off Disconnect CRT board connected at End of picture tube then turn set on and see if it comes on with volume, high voltage you can feel front of tv for static elect.... Let me know what happens then i can tell you what is wrong with TV.
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