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.
Check the printer connection status: Make sure the wireless signal is on, and the printer is connected to the same network as your computer or mobile device. If your printer has a light next to a Wireless icon or button , make sure the light is on. If it is off or blinks the printer is disconnected from the network.
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.
If you see an “unknown accessory detected near you” message (or similar), it means there`s an item compatible with the Find My network that might be traveling with you. If so, its owner may be able to see your location. You should look to see if something you`re borrowing has such a device attached.
Go to the HP PartSurfer web page. Select your country or region from the drop-down menu. In the HP PartSurfer`s Quick Search field, type any one of the three identification numbers for your computer: Part Number, Serial Number, or Product Number or Name, and then click Search.
Call 800-407-4005.
Start by checking your hardware
If you`re using a wired printer, make sure that the printer cable is properly connected from the printer to your PC. For wireless printers, check the wireless connection. Make sure the printer`s wireless option is turned on and available.
The Print Spooler is software built into the Windows operating system that temporarily stores print jobs in the computer`s memory until the printer is ready to print them. In some circumstances you may need to stop and/or restart the service.
The HP Utility is a Windows only tool that enables you to manage your printer from a computer with a TCP/IP connection. You can install the HP Utility from http://www.hp.com/go/DesignJetT1600/drivers.
Ghost printers are printers that continue to appear in Windows although they have not been used or installed on your system in a long time, which may have been years.
Open Settings -> Devices -> Printers and Scanners (or run a quick access URI command: ms-settings:printers ); Select a printer you want to remove and click Remove Device; Confirm the printer removal.
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.
If the LabelWriter appears as Unspecified or Unknown in Devices and Printers on Windows, it usually means that the computer has not identified that device as a printer yet.
The most common location to find your product information is on its label. For most HP products the product label is on its bottom, its side, its top, or its back. On some products, it might be inside a battery compartment or behind an access panel.
If the LabelWriter appears as Unspecified or Unknown in Devices and Printers on Windows, it usually means that the computer has not identified that device as a printer yet.
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).
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.