Usb - HP EliteBook 850 G4 Maintenance And Service Manual

USB

Symptoms
● USB devices are not recognized
● USB devices are not charging
Examples of USB device Not Recognized
130 Chapter 8 Troubleshooting guide
Possible causes
USB devices do not have the latest software drivers, port insufficient power, or not
compliant.
NOTE: USB Type-C uses a different connector entirely
Troubleshooting steps
1. Unplug USB device and/or restart the computer (wait for 2-5 minutes) to reset USB
port/hub in case of power surge.
2. Soft Reset (9. Soft reset (Default Settings) on page
recognized.
3. Verify if USB device is recognized in Device Manager > Universal Serial Bus
Controller, or USB is recognized without Yellow bang.
4. Verify if the latest USB driver or/and USB chipset driver are installed. USB driver
could be removed and reinstalled.
5. Make sure USB device is supported, for example, USB 3.0 device requires more
power drawn (0.9A) from USB port than USB 2.0 device (0.5A). As a result, identify
USB charging port to be used for charging a USB device, or an external AC power
adapter may be required for an external USB storage to work properly.
6. Test with verified working USB devices (keyboard, mouse, USB key) to make sure
USB ports are functional.
7. Test USB device on a verified working computer to make sure USB device is not
malfunctioning.
96) and verify if USB device is