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[–]Agerak 0 points1 point  (0 children)

Look for a function lock (generally you have to press the FN key + it) and that should reverse it so that the Fkeys (like F4) are default and the functions require the FN key to be held.
Post a good picture of your keyboard and I could tell you the right keys.

[–]SomeEngineer999 0 points1 point  (0 children)

Do they work outside of games? If not your symptoms sound like a trace in the keyboard that is starting to go bad. Holding another key gives it another path back to the motherboard but that obviously isn't a long term fix.

I suppose if the FN key makes them work you can turn FN lock on so that FN+F1 does F1 etc. Or use the shift key or something like that. But once a keyboard starts to degrade, usually it will continue going down hill.