![]() ![]() Check if your USB port works properly now.Repeat steps 4-6 above for other USB Root Hubs (if you have more than one) under Universal Serial Bus controllers.Verify that the check box beside Allow the computer to turn off this device to save power is clear, then click OK. ![]() Double click on the (first) USB Root Hub (if you have more than one).Expand the Universal Serial Bus controllers entry.On your keyboard, press the Windows logo key and R at the same time to invoke the Run box.You can take these steps to have a check: It’s also possible that Windows switches off your USB controllers when they’re not in use to save power, and “forgets” to switch them on when they’re needed. Step 3: Check your power management settings ![]() Reconnect the AC adapter or power cord.Disconnect the AC adapter or power cord from your laptop.To check for power supply issues, you can follow these steps: If your Dell laptop has any problem with power supply, the USB ports on your laptop may stop working. Step 2: Disconnect and reconnect your power cord (for laptop) If all your USB ports aren’t working, try Step 2, below. You can try switching your USB device into a different USB port. USB performance issues may occur if the USB port you plug your USB device into is dusty or damaged. Disconnect and reconnect your power cord (for laptop).You may not have to try them all just work your way down the list until you find the one that works for you. ![]() If your Dell PC can’t detect or recognize your USB device when you plug it into the USB port, here are 4 simple troubleshooting steps for you. ![]()
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