Device LEDs off after install

You installed the DataLogger and confirmed LEDs lit up — but now the lights are off and you’re not sure if the device is still working.

Why this happens

This is expected behavior. The DataLogger Installation Guide v3.3 states explicitly: “LEDs may extinguish after a period of time. This is NORMAL.” The device enters a low-power state to reduce heat and battery draw after initial power-on.
The vehicle’s ignition is off, so the port is providing reduced or no power — the device is asleep.
The device is hidden behind paneling and LEDs are simply not visible from the outside, not absent.
In rare cases, the device has lost contact with the diagnostic port and is genuinely unpowered.

Do not assume a fault. If LEDs lit up at install and the vehicle has since been driven, dark LEDs are almost always the normal sleep state — not a hardware problem.
Start the vehicle. On ignition power, the DataLogger wakes and LEDs should briefly illuminate again. If you see any LED activity (even a short flash), the device is receiving power correctly.
Check the portal. Go to Fleet > Diagnostics. If the asset shows a recent “Trip Start” or “Battery Voltage Reading” event in the Diagnostic Events feed, the device is reporting normally regardless of LED state.
Re-seat only if there was never any LED activity. If LEDs never lit up at any point after install, turn the ignition off, firmly press the device (or cable connector) back into the port, then turn the ignition on and watch for LEDs within the first 30 seconds.
Check cable connections on medium/heavy-duty vehicles. For 6-pin or 9-pin installs, confirm both ends of the cable are fully seated. On heavy-duty vehicles with twist-lock connectors, rotate the locking ring clockwise until it stops.

If LEDs never illuminate even on ignition power and the portal shows the asset as UNOBSERVED with no recent events:

Confirm you have the correct cable type for the vehicle class and port (OBDII, 6-pin, or 9-pin). A mismatch can provide no power.
Contact Servinix support with the vehicle make, model year, port type used, and device serial number. Support can confirm whether telemetry is being received.
If the device is confirmed non-functional, an RMA will be initiated.