1. Discoloration: The colors on the TV screen may become distorted, with certain colors appearing washed out or faded. Colors may also appear to bleed into each other.
2. Blurriness: The picture on the TV screen may become blurry or out of focus, making it difficult to see images clearly.
3. Dimming: The brightness of the TV screen may gradually decrease, making the picture appear darker than normal.
4. Flickering: The TV screen may flicker or flash intermittently, causing the image to appear unstable.
5. Lines or Dots: Horizontal or vertical lines, or clusters of colored dots, may appear on the TV screen.
6. Reduced Contrast: The contrast ratio of the TV screen may decrease, resulting in a lack of distinction between light and dark areas of the image.
7. Intermittent Operation: The TV may turn off and on by itself, or it may go into standby mode unexpectedly.
8. Buzzing or Crackling Sounds: Unusual noises, such as buzzing or crackling sounds, may be heard coming from the TV set.
9. Unusual Smells: A burning or electrical smell may be emitted from the TV, especially when the problem is severe.
10. Distorted Sound: Along with the visual issues, the sound quality from the TV may also become distorted or muffled.
If you notice any of these signs, it's likely that the TV tube is failing and may need to be repaired or replaced. It is important to seek assistance from a qualified technician or refer to the manufacturer's guidelines and warranty information for further troubleshooting and support.