If there is no picture or sound and the indicator light is on, there are two situations. One is that the system can't run, because by default, the power supply always provides 5V voltage to the chip. If you can remotely control the switch, then the part of the system will be fine. On the other hand, it is a question of system. If it can be turned on and off, there is still no picture and service, which is caused by a set of voltages on the power board. Generally, 12V supplies power to the main chip. Suggest sending them.

The TV screen suddenly went black, with no images or sounds. The red light in the lower right corner of the TV will still be on, but you can't turn it off by pressing the power button on the remote control. After the TV restarts, the TV can still start normally. The image is very clear, but a degaussing resistor was changed 4~5 months ago. Now a small part of the upper left corner of the screen is abnormal in color, and other parts will suddenly "serve" when the screen is black. Once the screen turns black, it will automatically reappear. I found a rule that if the TV is turned off for a long time, I will watch it longer next time. If I turn it on immediately after the screen goes black, I will watch it for a shorter time. I don't know why now. I hope a knowledgeable friend can help me. There are no more reward points. I hope everyone can help me. Thank you.