Scanner Tips Common USB Scanners Cannot Identify Problems

Scanner Tips Common USB Scanners Cannot Identify Problems

In order to install and use the scanner more conveniently, many beginners have begun to "close contact" with the USB interface scanner. Originally thought that the USB scanner is better than the scanner of the common interface, but who would have thought that the USB scanner will also add confusion to the user from time to time. This is not the case, the scanner that used to work normally turned into a "hardware that cannot be recognized by the system" in a blink of an eye. What's more, when the newly purchased scanner is inserted into the computer, the scanner sometimes cannot be I realized that this is what happened, how to solve it? Don't worry, I believe that after reading this article, these problems will be solved.

Frequently Asked Questions 1: The USB function of the motherboard is not activated.

Since the current Windows operating system supports Plug and Play (I believe that no one will use 98 or older versions anymore), if the USB scanner is plugged into the computer, if the operating system does not respond, then you It is necessary to check whether the USB function in the computer motherboard has been activated. If the function is not activated, the USB scanner cannot be automatically recognized.

When checking if 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 item, and check if the "USB Function" parameter under the setting item is set. "Enable", if it is, it means that the USB function of the motherboard has been turned on. If the "USB Function" parameter is set to "Disable", it means that the USB function of the current motherboard is not activated. You must modify this. Parameter, let its value become "Enable", 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 pop-up (as shown in Figure 1) property settings window 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.

Frequently Asked Questions 2: USB interface is not well sealed

In general, when the USB scanner is plugged into the USB port on the computer, the computer should be able to automatically recognize the scanner. If the system cannot automatically recognize the scanner, please check whether the computer is turned on according to the above method. In addition to the USB port function, you should also check the scanner's USB port. If your scanner is not a branded product, its USB interface may be slightly wider than the brand scanner's interface, which makes it easy to plug the USB interface of the scanner into the computer's port. The interface is not well sealed, which can easily lead to the scanner not being recognized by the computer system.

If this happens, you can use a USB extension cable to connect to the scanner's USB port. Of course, the USB extension cable size must be the same as the scanner's USB interface specification. If you can't find the extension cable for a while, you can manually press the scanner's USB port slightly in the way, so that when the interface is plugged into the computer's USB port, the interface will be better.

In addition, you should also pay attention to the fact that when the USB scanner is working, please do not move the scanner or computer arbitrarily to avoid accidentally changing the distance between them, resulting in the scanner's USB connection being loose, which ultimately affects The scanner could not be identified.

Frequently Asked Questions 3: The USB port is underpowered

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 requires power supply to work normally. USB devices plugged into the motherboard cannot be properly recognized by the computer when sufficient power is not available to them.

The lack of 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 into the new computer. In the middle, or remove all other USB devices that are not used temporarily, just plug in the USB scanner and you're done.

Frequently Asked Questions 4: USB port suspended animation

Many people think that USB scanners are hot pluggable because they support hot plugging. However, if the scanner is "forced" during the working process, the USB interface of the scanner will be It is easy to have a false animation. If it is serious, it can cause the USB interface of the scanner or computer to be burnt.

Once the "fake death" phenomenon occurs on the USB interface, the computer system cannot recognize it even if it is closely connected to the computer. At this point, the user can enter the device manager window of the system, find the USB scanner item in the device list, and double-click the item with the mouse, in the opened (as shown in Figure 2) scanner property setting interface, enter " Under the "Driver" tab, then click the "Uninstall" button to completely clear the original scanner driver, then restart the computer. If the system can automatically find the scanner, you can install the USB scanner in the usual way. The driver, so the fake animation of the scanner USB interface is eliminated. If the system still does not recognize the scanner after rebooting, you will need to replace the scanner or the computer's USB port.