With the rapid development of computer hardware, peripheral devices are increasing, keyboards, mice, modems, printers, scanners have long been known, digital cameras, MP3 players are coming With so many devices, how to access a personal computer? USB is generated for this purpose. USB is an interface that standardizes and simplifies the connection of computer peripherals. As a most commonly used tool, the installation and use of the scanner is now no longer a normal interface and changed to a USB port.
But not When new users are used, they will always be troubled by various problems. For example, some netizens say that their scanner does not recognize the USB port, so they ask how to solve the problem that the scanner does not recognize the USB port. For everyone to answer:
The USB function of the motherboard is not activated
Because the current Windows operating system supports Plug and Play, when the USB scanner is plugged into the computer, if the operating system does not respond, then You first need to check if the USB function in the computer's motherboard has been activated; if the function is not activated, the USB scanner cannot of course be automatically recognized.
When checking whether the USB function of the motherboard is turned on, you can restart the computer system, then go to the BIOS setup window, find the "PNP and PCI Setup" setting, and check the "USB Function" under the setting item. Whether the parameter is set to "Enable", if it is, it means that the USB function of the motherboard has been activated, if the "USB Function" parameter is set to "Disable", it means that the USB function of the current motherboard is not Activate, at this point you must modify the parameter, let its value become "Enable", and finally save the BIOS parameters and restart the computer, so that the motherboard's USB function is enabled.
Of course, there is an easier way to see if the USB function is enabled directly under the Windows interface without restarting the computer. As long as you open the device manager window of the system, and then check the device list, whether it contains the "USB Root Hub" project, if there is, then double-click the project, in the property settings window shown in Figure 1 Check if the current working status of the device is normal. If it is normal, it indicates that the USB function of the motherboard has been activated.
USB port power supply is insufficient
Even if the USB function of the computer motherboard has been turned on, there is no guarantee that any USB device plugged into the computer can be correctly recognized by the system. This is because each USB device It is also necessary to use the power supply "Driver" to work properly. Once the motherboard cannot provide enough power to the motherboard, the USB device inserted into the motherboard can not be correctly recognized by the computer.
The phenomenon of insufficient power supply on the USB port is mostly found in older motherboards. It may also occur when multiple USB devices are connected at the same time. To avoid this, the best way is to insert the scanner. Go to a new computer, or remove all other USB devices that you can't use, and then just plug in the USB scanner.