Troubleshooting for Key Issues: Please replace the keyboard with the spare switch provided, and press and hold Fn + Spacebar to reset. Troubleshooting for Charging Issues: Please replace the USB cable and test the charging, while prioritizing using the computer's USB port for charging. Please do not use a fast-charging cable and wall socket to charge the keyboard Q&A Q1: What should I do if the keyboard cannot charge or does not respond when connected? A1: First, try replacing the USB cable and ensure it is properly and securely connected to the keyboard. Next, use a different USB port for charging and avoid utilizing a charger or fast-charging cable. Additionally, you can check the battery level by pressing and holding Fn + Enter while the side button is in the "ON" position to verify if it has successfully charged. Q2: What should I do if the keyboard is unresponsive or certain keys do not respond when pressed? A2: Please replace the keyboard with the spare switch provided, and then press and hold Fn + Spacebar to reset. Q3: How can I resolve issues with the keyboard's unstable wireless connection, frequent disconnections, or failure to connect? A3: Ensure that the battery is fully charged, then re-pair and reconnect the keyboard. Remove any sources of interference and press and hold Fn + Spacebar to reset.