Unknown Printer

How to Identify and Fix Common Problems ?

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If the error message, Unknown device appears, this can indicate that there is not adequate power and the PC can not identify the printer correctly. Verify that there are no extension cables and that the power cable is no longer than five meters. Reseat the power cables.
Restart the printer and the computer or mobile device to clear possible error conditions. Restore Wi-Fi setup mode. Most printers with a touchscreen display or menu: Open the Wireless or Setup menu, select Network setup or Settings, and then select Restore Network Settings.
The printer is either low in toner, the density is set too low, or the Economode may be turned on. Remove the toner cartridge and shake it. This will redistribute the toner and often will temporarily solve the problem. However, this usually indicates it is time to install a new cartridge.
Updated: 10/11/2021 by Computer Hope. An unknown device is a device name listed in Device Manager that Windows cannot identify or doesn`t have the appropriate drivers to be recognized.
Open the start menu and select Control Panel > Administrative Tools > and choose the Services icon. Locate the Print Spooler service and right-click. Then select the option to “Stop” the service.
Check cables or wireless connection

Make sure that the printer`s USB cable is properly connected from the printer to your PC. If your USB isn`t recognized, see Automatically diagnose and fix Windows USB problems. Check the wireless connection (for wireless printers).

In Windows, search for and open Add a printer or scanner . Click Add a printer or scanner, and then wait for Windows to locate available printers. If your printer is found, click it, and then click Add device to complete the driver installation.
Do a hard reset on your printer. To do this you just need to turn off your printer, unplug for a few minutes and then plug the printer again. If that still doesn`t work, try turning the printer and your computer off, and then start it back up again. Try uninstalling and then reinstalling your printer driver.
Make sure your Wi-Fi network and printer setup meet connection requirements. Restart the printer and the computer or mobile device to clear possible error conditions. Make sure the printer is not connected to a computer with a USB cable.
FIX Unknown Device Drivers with Windows Update

Open Device Manager and go to the device in question in your device. Typically, it is listed as an Unknown Device in the Other devices node and expands the section. Right-click on the Unknown Device and select Update Driver.

The main reason for Unknown Device to display in your Device Manager is because you have a device that is not working correctly. To fix this issue, obtain an updated driver for the device. Use the following methods to enable Windows to recognize your device.
Check cables or wireless connection

Make sure that the printer`s USB cable is properly connected from the printer to your PC. If your USB isn`t recognized, see Automatically diagnose and fix Windows USB problems. Check the wireless connection (for wireless printers).

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

HP Laserjet 4250 – RFU LOAD ERROR
ANSWER : Italiano:

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Unknown Printer

evenly spaced horizontal lines on hp laserjet III printout
ANSWER : The lines would be a toner cartridge problem. Which paper tray? The MF tray or the optional paper cassette?

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Unknown Printer

LaserJet 4 won't Power Up
ANSWER : I haven’t seen that particular behavior on that model. It either works or it doesn’t. My first choice would be the power supply.

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Unknown Printer

13.02.00 paper jam
ANSWER : Sticking pickup roller solenoid. Easy to get to on that model. Remove top and right side covers. You will see it at the lower left. Remove the 1 screw holding it in and then take the top plate off being careful not to lose the tiny spring. Scrape off the goo and replace it with some thin sticky backed felt. You can find some in the local hardware store. It’s used for the bottom of chair legs.

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Unknown Printer

HP Laserjet M3035xs RFU Upgrade
ANSWER : There’s no way.

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Unknown Printer

How to copy a card slot in HP laserjet 4250N
ANSWER : None that I know of, using a computer is likely your best option but I never attempted it.

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Unknown Printer

HP Laserjet 4200 50.2 Fuser error
ANSWER : if you are using a good fuser the next part to try would be low voltage power supply

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Unknown Printer

LaserJet 2200d Stopped Working
ANSWER : I am able to print a demo page and no lights blinking, tried different slots to no avail

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Unknown Printer