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USB port Trobleshooting

Last Updated: Sep 09, 2013 04:14PM COT


This article applies for all USB connected devices.


If you are having problems with your USB device please follow this steps:

1. Verify your USB device is recognized by your Operating System (OS).

You can perform this step by going into the Control Panel > System and Security > Device Manger.

On the list look for "Universal Serial Bus Controllers" ,Then locate your device and make sure is not disable or it has a yellow exclamation mark.

If the device is not on the list most likely your OS is not recognizing it.

usb root


2. Turn OFF the power save mode of all the USB ports under the Device Manager.

You can perform this step by going into the Control Panel > System and Security > Device Manger.

Device Manager

On the Device Manager select the USB root port and then right click for properties.

Then select the Power Management tab and uncheck the option "Allow the computer to turn OFF this device to save power"

usb power

Then hit OK.


3. Use a different USB port on your PC or Laptop.

Depending on the model and maker your PC or Laptop may have different speeds and power for different USB ports, make sure you test your device and all the port available.

For PC´s make sure to use the back UPS ports for testing also.


4. Connect one single device to you USB port , do not use any HUBS.

Depending on your USB version it will vary on speed and power therefore if you have several devices connected to one sigle port using a HUB the speed and power is divided among those devices connected.

If there is one device needing more power than other like a External HD for example , the other devices will not have enough power to function.

Therefore make sure to test you device without any HUB´s.

Note: If your device is a HUB then have in mind that some devices connected to it will not work, this is not a HUB problem but as explain before a issue of the Main USB not having enough power to power up several devices.

In this case it is recommended to use a external AC adapter HUB.


not ac powerac power hub


5. Try your USB device on another PC or Laptop.

If you device does not works on another PC or Laptop most like is defective.

If the device does work then the problem could be related to the Operating System (OS) or Laptop port itself.

On some OS the drivers need to be installed for the device to work however on plug and play devices NO driver is needed therefore make sure to update the drivers list on the device manager when the device is appearing with a yellow mark.
 

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