How do I reset the audio system on my Vauxhall Astra?

I recently changed the battery on my Vauxhall Astra and now the audio system is not working properly. Is there a way to reset it?

First, try pressing and holding the power button on the audio system for 10 seconds to see if it will reset. If that doesn't work, you may need to disconnect the battery for a few minutes and then reconnect it to reset the system.

Another option is to check the fuse for the audio system and replace it if necessary. It's also a good idea to make sure all the connections are secure.

If those methods don't work, you may need to take your car to a certified mechanic to have them diagnose and fix the issue.