There are a few potential causes for why your PlayStation 4 may not be connecting to the internet. One possibility is that your router is not compatible with the PlayStation 4. If you have an older model, you may need to update it to support the latest firmware. Another possibility is that your internet service provider is not providing a good enough connection speed for your PlayStation 4. If you have a high-speed internet connection, try changing your ISP or upgrading to a more reliable one. Finally, if you are using an older version of the PlayStation 4’s firmware, there may be some issues with connecting to the network and/or with sharing games and other content between your devices.