Hi Deep,

The USB port on the right side and the one on the rear end of Inspiron N5110 are USB 3.0 ports. We can try reinstalling the USB 3.0 drivers which can help us with the issue. Please follow the below mentioned steps:

• Click Start, type Device Manager and press Enter.
• Expand Universal Serial Bus Controller.
• Right click the USB 3.0 Host Controller drivers and click Uninstall.
• Ensure to check the box for Delete driver software for this device.
• Restart the computer after uninstallation.
• Refer the following link to download the USB 3.0 drivers: http://dell.to/13lEREC
• Install the drivers and restart the computer.

Please post the results.

Hello I did same but still Both USB ports are not working..............

Hi Deep,

May I know if the USB 3.0 Host Controller drivers are listed in Device Manager with any exclamation mark?

Let us try to update the chipset drivers and the BIOS. Refer the below mentioned links for the latest Chipset and BIOS:

Chipset - http://dell.to/11zclez
BIOS - http://dell.to/114vSlD

Please ensure that the battery charge is minimum 15% and connect the AC Adapter while updating the BIOS. Also, do not power off the laptop during the BIOS update.

Do let me know the results.

Still problem 

USB at Right Hand and Back side of my Inspiron 15R N5110 are not working

not resolved.

please Help

Dear DELL Kalyan,

       I followed your instruction about USB port and solved that. Thanks alot.

Regards,

Faisal P Moidunny

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