No impact, no liquid, good in the morning, problems in the evening, at once.
No combination of Function key or shift key, will allow any display of " a,f,:,x,c,n,<,>,?.
Rebotted, booted into safe mode, command prompt. No change or registration of the key strokes.
Doesnt make sense, all 10 keys , hardware failed at once without any external damage??
Laptop just of Warrentee and awaiting support reply from Acer.
Vili from Canada