This is because the f1-f12 is set as the shortcut function key, and it can be cancelled, the specific cancellation method is:
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1. Locate the function key lock key pointed by the arrow on the computer keyboard.
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2. Then, find the Fn function key pointed by the arrow on the computer keyboard.
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3, then press and hold Fn, and then press and hold the shortcut function lock key to unlock the shortcut function key, you can restore the normal use of f1-f12 key.