A week ago my wireless network card died on my IBM Thinkpad T42. I visited the IBM shopping website to look for the Intel Pro/Wireless 2200BG and found it cost approximately $80 not including taxes and shipping. Knowing the price tag was totally unreasonable, I looked somewhere else, and I ended up getting it at Dell for half the price!
After the network card arrived, I immediately replaced the card and booted up my laptop. Next thing I know, I see an error message:
1802: Unauthorized network card is plugged in
Power off and remove the miniPCI network card.
Apparently IBM insists on only accepting “IBM brand” wireless cards through a restriction set in the BIOS. However, there is a fix available for the 1802 error: a DOS program no-1802.com, which will flip a single bit in the CMOS, allowing use of any Mini-PC wireless card.
I disabled the wireless card through the BIOS, to avoid having to physically remove it. Then follow the steps to apply the fix:
- Download no-1802.com
- Boot the laptop in DOS mode
- Run no-1802.com
Nothing happened after running the command, I rebooted the laptop and re-enable the wireless card from the BIOS. The laptop was able to boot without any issues, and I’m able to use my new wireless card successfully!
For better conveniences, I downloaded bootable CD image which allowed me to boot in DOS. A floppy disk image is also available to download as well.
For more information refer to ThinkPad 1802 Error Fix or Problem with unauthorized MiniPCI network card.
Link Summary
- http://www.vincentkong.com/wp-content/uploads/2008/06/no1802.com
- http://www.vincentkong.com/wp-content/uploads/2008/06/no-1802-cd.zip
- http://www.vincentkong.com/wp-content/uploads/2008/06/no-1802-disk.zip
- http://www.command-tab.com/2006/02/26/thinkpad-1802-error-fix/
- http://thinkwiki.org/wiki/Problem_...unauthorized_MiniPCI_network_card
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