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Press and hold the fn key for 30 seconds to see if you get a menu to switch to legacy mode.
You can also restart, press F1 continually to get into BIOS --> configuration --> change hotkey mode
you go into the bios to change it?
how come you can't login? Should not need F keys to login
FN key has nothing to do with the 1-0 number keys/ special characters.
Make sure caps lock is turned off and you should be able to hold shift and press 1 to get !... etc.
press shift key 5 times in a row, click yes to turn on sticky keys
then press shift 2 times, now try the special character you need
restart and try holding Fn and press F1 repeatedly
seems you may be stuck needing to get an external keyboard to plug in so you can login or get into bios
some devices say on startup what to press to get into bios, but Lenovo is pretty universal using the F1 key
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