usb port problem

check in settings -control panel. in device manager make sure it's recognized nad chech yuor cmos setup
One question though did it ever work?
when did it stop work working?
Also did it ever work?
answering these questions will help alot.

check in settings -control panel. in device manager, it could be a hardware problem. One question though did it ever work?
when did it stop work working?
Also did it ever work?
answering these questions will help alot.

Check the pins, are there 4? Humidity and electicity do not go together and you could have lost one or it is corroded. Human error during build out is also a possibility. Also unknown if there is a cable feeding the port inside the PC if so there are 2 more possibilities for human error (not plugged in).

Suggest you try a usb device like an optical usb mouse seee if the mouse powers up if so the port has 5 volts ok so it isn't the internal fuse. If it doesn't light you will need to get the laptop repaired. The port has 5 volts avaliable regardless of drivers/ setup extra. If the laptop isn't under warrantee would buy a usb hub and use it if more than 1 device is needed at 1 time.