1, the power is not plugged in, and the computer can't find the necessary equipment.
There is something wrong with the driver.
Solution: 1 Plug in the power again and see if the display light of the scanner or printer is on. 2. Open the Add and Remove Programs dialog box (double-click my computer, open the control panel, and double-click Add and Remove Programs) to see if there are drivers for scanners and printers, and check whether the printer drivers are normal. You can try reinstalling the driver. 3. Pay attention to the printer model selection in the print window. If the printer model in the print window is incorrect, you will not be able to print or scan. 4. The scanning function requires the drawing function of the computer. Open the drawing program, and there is a command "From Scanner and Camera (A)" in the file drop-down menu. If the scanner has a driver installed, it will be displayed in black. When the scanner is powered on and the data cable is connected normally, click it and the scanner will appear. Press OK all the time to realize the scanning function. Printer is one of the output devices of computer, which is used to print the computer processing results on related media. There are three indicators to measure the quality of a printer: printing resolution, printing speed and noise. There are many types of printers, which can be divided into impact printers and non-impact printers according to whether the printing elements impact the paper. According to the structure of printed characters, there are full-width printers and dot matrix printers. There are serial printers and line printers according to the way a line of words is formed on paper. According to the technology adopted, it can be divided into cylindrical, spherical, inkjet, thermal, laser, electrostatic, magnetic and LED printers. The printer was invented by John Vaught and dave Donald. A device that prints computer operation results or intermediate results on paper in a specific format such as numbers, letters, symbols and graphics that people can recognize. Printers are developing in the direction of light, thin, short, small, low power consumption, high speed and intelligence. With the rapid development of the Internet, it is predicted that the paperless era is coming, and the era of printers has arrived. However, the global consumption of paper is increasing exponentially every year, and the sales of printers are increasing at an average rate of nearly 8%. All this indicates that printers will not disappear, but will develop faster and faster, and their application fields will become wider and wider. From the appearance of the world's first printer in 1885 to various needle printers, inkjet printers and laser printers, it has been at the forefront in different years. Today, let's look for the historical footprint, review the glorious history of inkjet printers from three aspects: technology, brand and product, application market and target consumers, and make a simple analysis of the future development trend of inkjet printers.