Here are some steps to follow to diagnose and rectify the issue with not charging your laptop:

1. Check the power cord and its ports for damage
2. Check that the power cord is firmly connected to the wall socket
3. Check that the power cord is securely plugged into your laptop
4. Check to see if there is a power issue in the wall socket
5. Try another power cord and wall socket
6. Check the laptop port and its pins for dirt or damage
7. Check laptop USB or peripheral ports for power issues
8. Check the laptop with diagnostics software to ensure its proper functionality
9. Clean dust and debris from laptop air vents and fans
10. Try resetting laptop’s Software Distribution Folder
11. Run an antivirus to check if any malicious software is blocking the connection
12. Replace any damaged electronics components