It can be that the battery of the keyboard is low, and the common reasons for this situation and solutions are as follows:
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1, the battery is insufficient, replace the new battery, if it is a rechargeable battery, it needs to be fully charged.
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2, the receiver contact is not good, re-plug a keyboard signal receiver.
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3, the keyboard is broken, replace it with a new keyboard.
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4, there is strong magnetic field interference around, away from the interference source.
Sometimes the computer operation of big things card will also be like this, such as games, etc., which requires you to distinguish where the problem is. Is the mouse problem change a test, the computer card problem, avoid the card will not appear you said the problem, if it is a system problem, restore the system or reinstall.