Some USB devices are not APM/ACPI friendly and may not operate properly after resuming from Standby or Hibernation. Some of these steps may not apply to your computer. Test the attached USB device after performing each step.
Verify that a USB port and an operating system with USB support are being used to attach a USB interface external device to a Value Line notebook. Note: The following is an example image of a Value Line notebook USB port.
Verify that the latest BIOS and embedded controller for the Value Line notebook has been installed.
Verify that the USB device and any required drivers were installed in accordance with the manufacturer's instructions.
This may require removing the USB device and the drivers, and then reinstalling the USB device and the latest drivers.
Verify the USB device works on another machine, if available.
Verify another USB device, if available, works on this machine.
Verify that the USB device is USB 1.1 or 2.0 compliant.
Plugging specific USB 1.1 compliant devices into a USB 2.0 compliant port will cause an error message dialog box to appear. That dialog box details that a non-high speed device has been attached to a high speed port. The device should function normally, but at a slower speed than if a 2.0 device is attached to 2.0 port. Most USB 1.1 devices will function normally in USB 2.0 ports.
Verify that external power is attached if required.
Some USB 2.0 devices will require additional power from external sources or an additional USB port to function correctly in USB 1.1 compliant computers.
Verify that the latest Microsoft Windows Service Pack has been installed for the operating system installed on the computer.
There are updates and fixes to USB 1.1 and USB 2.0 available in Service Packs.
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