Here are some of the steps you can try to get your laptop into sleep mode:

1. Check your battery settings – Check the system settings for battery and power management to make sure the system is set to automatically enter sleep mode.
2. Check your display settings – Check the display settings (e.g., brightness, sleep mode) to make sure the display is set to turn off the display when the laptop is inactive and to automatically enter sleep mode.
3. Update and restart your laptop – Make sure you have the latest operating system updates installed and reboot your laptop to ensure proper functioning.
4. Unplug any external devices – Unplug any external devices (e.g., USB sticks, CD/DVD drives, etc.) that may be preventing the laptop from entering sleep mode.
5. Uninstall any unneeded programs – Uninstall any programs that are not being used regularly as they may be preventing your laptop from entering sleep mode.