| Blinks | Meaning | Top Priority Action |
| 1 Blink | Critical Low Voltage | Charge battery; check ground and fuse. |
| 2 Blinks | Master Watchdog Timeout | Reboot; check CAN bus resistance 60 Ohms. |
| 3 Blinks | CAN Communication Fault | Check for loose cables or low voltage spikes. |
| 4 Blinks | Tablet Connection Lost | Reconnect tablet; exit Diagnostics Mode. |
Most hardware errors are tied to Power or Communication. If you are seeing recurring blinks, the two most effective tools in your kit are:
A Battery Charger: Ensure you are reaching 14.0V+ to add capacity.
A Multimeter: Ensure you have 60 Ohms between the Green and Yellow wires in the Power Module.