How to fix - 1802 unauthorized network card is plugged in power off | System is halted | Lenovo Thinkpad t420 | Blogger Arfan https://youtu.be/x7PPpvUBSUk Keyword Unauthorized Network card is plugged in power off, remove the network card, How to fix lenovo laptop, Fix laptop opening problem, 1802: Unauthorized network card is plugged in, method to fix Lenovo ThinkPad error 1802 & 0271 errors, BIOS reset method #1802: Unauthorized #Problem with unauthorized MiniPCI network card, #1802 Unauthorized network card without installing a new card, #error at bootup: 1802: Unauthorized network, #Boot error 1802, #Fix: Unauthorized network card is plugged in - Power off, Lenovo thinkpad t420 fixing problem, system is halted problem, solution on Laptop LAN card, unauthorized Network card solution, Description: If your LAN card is damaged or not working then you will see the warning message "1802: Unauthorized network card is plugged in - Power off and remove the mi...