There are several possible reasons why the TV does not respond to the remote control. The most common is either a problem with the batteries in the remote control or a problem with the infrared (IR) sensor built into the TV itself, which receives signals from the remote control. Other possible problems include signal interference caused by other devices, or simply the need to reset the TV.
To start troubleshooting, check the batteries in the remote control and replace them if necessary. If this does not solve the problem, make sure that nothing is blocking the signal from the remote control to the TV and try to ensure that you can see them directly. If none of these solutions work, you may need to reset your TV. This can be done by unplugging the TV from the power supply, waiting at least a minute and then turning it back on. After resetting the TV, try using the remote control again.
If none of these solutions work, or if you have a universal remote control, additional troubleshooting steps may be required. In this case, you may need to refer to your TV's user manual for additional help.
If none of these solutions work, it may be worth contacting a professional repair company. They can help diagnose the problem and give you more information about possible problems with your TV or remote control that are causing the problem. It is always best to try simple troubleshooting methods before calling in an external service to avoid unnecessary costs. However, if the problem persists, it may be worth investing in professional repair services to get your TV working again.