Detailed Answer
Troubleshooting unresponsive buttons: 1. Clean (blow air into the key gaps; dust jamming is the most common cause); 2. Check the key caps (replace if worn/deformed); 3. Aged conductive rubber (return to factory for replacement); 4. Oxidized contacts (clean). Lider LD series key caps can be replaced individually (consumable parts); silicone keys + gold-plated contacts last 10 million presses. If still unresponsive, return to the factory for repair.
| Clean | Air blow into gaps |
| Replace | Key caps/conductive rubber |
| Lider | Consumables replaceable |
Note:Don't press hard on unresponsive keys — clean first, then replace parts.