Detailed Answer
Short-range troubleshooting: 1. Low battery (check first); 2. Loose/damaged antenna; 3. Receiver antenna blocked/inside cabinet; 4. Increased environmental interference (new equipment); 5. Receiver aging (sensitivity drop); 6. Abnormal transmit power (factory service). Following this order resolves 90% of LIDEER LD series issues; if the range stays short, send for inspection.
| Step 1 | Battery + antenna |
| Step 2 | Environmental interference |
| Step 3 | Inspection |
Note:Shortened range is an aging signal; handle it promptly to prevent loss of control.