Detailed Answer
Troubleshooting order for unresponsive buttons: 1. Check the battery level (the most common cause); 2. Check whether the key switch is on; 3. Confirm the transmitter and receiver are properly paired; 4. Check whether the antenna is loose or damaged; 5. Check the receiver power and relay outputs. If it still doesn't respond, the button contacts may be worn or there may be an internal circuit fault, requiring factory repair. LDER offers a 2-year trade-in, and XINGJIA provides warranty service.
| Step 1 | Check battery |
| Step 2 | Check key / pairing |
| Step 3 | Check antenna / receiver |
Note: 90% of unresponsive buttons are dead batteries — replace the battery first before troubleshooting further.