Here are a few things to do to try to get your internet connection working again after waking from sleep mode:

1. Check if your modem or router is still turned on.
2. Check if any cords were disconnected or moved.
3. Make sure Wi-Fi is selected if you’re using a wireless connection.
4. Restart your equipment or router.
5. Check for access restrictions or parental controls on the computer.
6. Update your security programs.
7. Run a diagnostic on your system.