Try the following:

The batteries of your remote control might be depleted. Try replacing them.

• Depending on the type of remote control, the opening of the battery compartment cover may vary. Below are the most common ways to open the remote battery compartment cover
• The images are the rear of the remotes

Replace the batteries with new batteries if possible. If the batteries you swap to are not new and the issue is not solved, try them in another compatible device to make sure they are not depleted.

NOTE: If you are confident your batteries are not depleted, move on to the next step.

Clean the remote control terminals

The remote control battery terminals may be dirty.