Before replacing any boards, try these steps in order:
Before calling for service, you can attempt these non-invasive fixes:
| Symptom | Likely Cause | Solution | | :--- | :--- | :--- | | Error appears after power outage | Controller communication glitch | Hard power reset (Step 1) | | Error appears randomly once a week | Outdated firmware or corrupt NVRAM | Firmware update (Step 2) | | Error appears only when panel is touched | Loose/broken panel cable | Re-seat the cable (Step 4) | | Error appears every time, no SP mode access | Dead controller board | Replace controller (Step 5) |
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