Wireless keyboards sometimes fail. There are several possible situations:
1. The battery needs to be replaced
2, wireless signal interference Wireless keyboard is 2.4Ghz wireless frequency band, which has Bluetooth wifi digital cordless phone, may interfere with him. If so, try a different Angle and see if it improves.
3, wireless keyboard placed for a few minutes do not use will enter the standby mode (power saving) This time to press the first may have a \"failure\" situation.