Last ned Brother Printer Setting Tools for QL-800 fra https://support.brother.com/g/b/downloadlist.aspx?c=no&lang=no&prod=lpql800euk&os=10011

Logg på som lokal admin og installert det. 

Hvis printeren har gått i dvale, slå den av og så slik at den er på når den konfigureres med verktøyet.

Fra Brother suport nettside:

"This application is for Windows only.

By using the Printer Setting Tool, the printer’s communication settings and device settings can be specified from the computer.

• Before connecting the USB cable to the computer, check that the Editor Lite lamp is not lit. If the Editor Lite lamp is lit, press and hold down the Editor Lite button until the lamp goes off.
• Make sure that the AC adapter is connected to an AC power outlet.
• Make sure that the printer driver has been installed and is functional.
• Connect this printer to a computer with a USB cable.
  With this tool, settings cannot be specified using a wireless LAN connection.

1. Connect the printer to the computer.
    
2. For Windows 10
   From the [Start menu], click ([All apps] -) [Brother P-touch] - [Label & Mobile Printer] - [Printer Setting Tool].
   
   The main window appears.
    
3. Select the printer from the [Printer] drop-down list.
   You can select either [Communication settings] to configure the printer's communication settings or [Device settings] to change the printer's device settings."

Endre denne innstillingen fra Device settings:  «Auto power off when AC adapter is connected».

Flere innstillinger som kan konfigureres: 

http://support.brother.com/g/b/faqend.aspx?c=us&lang=en&prod=p750weus&faqid=faqp00100037_000