How to Repair Older Televisions

Older televisions generally use CRT (cathode ray tube) technology, compared to modern LCD televisions, CRT televisions have a shorter lifespan and are prone to failures such as blue screen and no picture. Here are some ways to fix old TVs:

1. Check the power supply and signal cable: first check whether the TV is connected to a power outlet, if it is connected but not responding, you can use a multi-function meter to measure whether the power cord voltage is normal. At the same time, check whether the signal cable is connected correctly and try to replace the signal cable.

2. Adjust brightness, contrast and color: The brightness, contrast and color adjustment knobs on older TVs may be drifting or broken, so try adjusting them and check the results. If the knobs are broken, try replacing them.

3. Replace the picture tube: If the TV is outdated and has display problems, you may need to replace its picture tube. This is a more complicated process and needs to be done by a professional repairer.

4. Cleaning the internal components: Sometimes the internal components of the TV set can fail due to dust, dirt, etc., so you need to clean the internal components regularly.

In short, repairing an old TV set requires some specialized knowledge and skills and it is not recommended to do it yourself. It is recommended to look for a professional repairer to carry out the repair.