Just two weeks ago I had a big issue after updating my bios for the T61,which i just bought that day.
After that T61 would not reboot and a error code 1802 appeared saying 'unauthorised network card'.
I took the machine back to the IT service centre where I purchased and they restored everyting back in the first
bios setting + a new Wlan chip.
Thanks to popSiCle.
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