Why the barcode scanner can not scan the barcode

☞The common failure of barcode scanners:

barcode scanner cannot scan the barcode
First of all, it is necessary to understand clearly, is it possible to scan the barcode but the data is not uploaded? Or the scanner has a laser but can't scan the barcode?You can scan the barcode but not upload it to the computer. Generally, the computer and the scanner are not connected well. If it is wired, check the port and line. If it is wireless, you must reset the pairing receiver.
If there is a laser but it does not read, there are several possible reasons:
1. The function of reading this barcode is not turned on;
2. The barcode does not meet the specifications, such as lack of necessary blank area, low contrast between bars and spaces, and inappropriate width and narrow ratios between bars and spaces;
3. Direct sunlight, the photosensitive device enters the saturation region;
4. The surface of the bar code is covered with transparent material, and the reflectivity is too high. Although the bar code can be seen by the eyes, the reading conditions of the collector are strict and cannot be read;
5. If the hardware is faulty, please contact your dealer for maintenance.
☛Common faults of barcode scanner ——After connecting the serial cable, there is no data transmission when reading the code
It may be that the serial port mode is not set or the communication protocol is wrong. To set the scanning serial port mode to serial port mode, reset to the correct communication protocol.
☛Barcode scanner common fault  - LED light is off, no buzzer, no laser
The analysis may be that the power supply of the scanner gun is not connected, the scanner gun is not powered on, or the interface of the data cable is loose and the contact is poor. Check the scanner wire, make sure the computer is powered properly, and connect the data cable to the scanner again.
☛The common failure of barcode scanner - After scanning a barcode, it crashes or the computer shows that the USB device cannot be recognized when using a USB cable
It may be that the cable is bad and the data cannot be transmitted and the machine crashes and the USB device is bad. You need to find a dealer to buy a replacement wire.
☛ Common faults of barcode scanner- scanning are normal, but the keyboard cannot be used
It may be that the internal IC of the barcode scanner is bad and burned out. It needs to be returned to the manufacturer for repair.
☛Bcarcode scanner common fault  - the laser is always on
It may be that you have scanned the manual to set the bar code to be in constant light mode, and you need to restore the factory settings and return it to the manufacturer for repair.
☛A common failure of barcode scanner - No sound after power-on, no light after pressing the button
It may be that the scanner is not powered on, the scanner is not powered on, or the data cable interface is loose and the contact is poor. You need to check the scanner cable to ensure that the computer is powered properly, and the data cable is reconnected to the scanner.
☛Common faults of barcode scanner - use serial port data to output garbled characters
It may be that the scanner is a non-standard serial scanner. You need to check whether the scanner is the corresponding interface.
☛The common failure of barcode scanner - Bluetooth barcode scanner cannot connect to computer normally
It may be that the Bluetooth does not match, you need to insert the Bluetooth receiver provided by the manufacturer, and check the connection method of the corresponding system according to the manual to connect.