The T40 came to me (from another employee at my place of work) as "wireless upgradeable". Bought the ThinkPad 11a/b/g Wireless LAN Mini-PCI Adapter II (US), model 73P4301, from the IBM/Lenova website @ $65.00. Chose it because it was the most recently released (and presumably most recently designed) of the available cards.
Physically installed the mini-PCI card in the T40, with the help of one call to IBM/Lenova support in Atlanta (800-426-7378 from the U.S.). Booted the T40 and got the well-known Error 1802 ("Unauthorized network card is
plugged in. Power off and remove the Mini PCI network card.")
Called IBM/Lenova support again and got "Rocky". He patiently and expertly explained the solution. 1) Upgrade the BIOS to version 1RETDNWW (3.19), released 2005/10/25. 2) Upgrade the Embedded Controller to version 1RHT71WW (3.04), released 2004/11/15. Then, after booting, install 3) the driver, and 4) Access Connection software. More on steps 3) and 4) below.
Incidently, "Rocky" really knows his stuff. That was the best phone help support I've gotten in years.
Steps 1) and 2) went well. When I booted the T40 it recognized new hardware and asked for the diskette that came with the hardware. The process completed without any errors.
I then hit the "Fn" and "F5" keys simultaneously, which is supposed to turn the wireless card on/off, and is an indicator of its being installed properly. The display indicated that the driver needed updating. Got file 77cw14ww.exe, dated 2005/09/01, from the IBM/enova web site. After uninstalling the driver from the diskette, I installed the new driver without a problem. The "Fn-F5" combination then worked as intended. Step 3) done.
Incidently, when installing and uninstalling drivers and utility software, it's good idea to reboot after every change.
For step 4), I could not make Access Connection work properly. I tried both the newest version, 4.01 (dated 2005/12/20), and the next-to-last version, 3.81. In both cases, when Access Connection was installed, the "Fn-F5" key combination did not work (got message to the effect that a card is not installed).
Decided to let Windows XP SP2 control wireless networking (backup option suggested by "Rocky"). Went to Control Panel and clicked on Network Connections -- and saw nothing. Frustrated. Windows doesn't know about the wireless adapter. More research needed.
With some help from a web site, clicked on Control Panel --> Administrative Tools --> Services --> Wireless Zero Configuration. Changed Start Up Type from Disabled to Automatic. Rebooted. Message in tray says "Detected wireless network" -- my router. Happy ending to the story.





