Troubleshooting / Power outage

Security Camera Offline After a Power Outage

When power returns but one or more cameras stay offline, isolate whether the failure is power, Ethernet, addressing, recorder discovery or only remote access.

Do not start with a factory reset. First confirm which layer failed; resets can create new addressing or credential problems without fixing a damaged cable, PoE port or power supply.

1. Confirm the recording chain has power

Check the NVR, PoE switch/injector, router and any separate camera power supplies.
Look for normal switch/NVR link or PoE indicators.
If only remote viewing is down, verify whether local NVR recording is still working before blaming the cameras.

2. Reboot in a controlled order

Bring the router/network core up first, then the PoE switch or NVR, then cameras. The goal is to avoid diagnosing several devices while they are still obtaining addresses or rebuilding links.

3. Check IP/subnet changes

After an outage, DHCP assignments, static-IP conflicts or network-isolation settings can make a powered camera appear missing. Confirm the camera has an address in the expected subnet and that VLAN/isolation rules still allow the NVR to reach it.

4. Swap one variable at a time

If one camera remains offline, test a known-good switch port and short cable. If the problem follows the camera, investigate the camera/power input. If it stays with the cable or port, investigate that link instead.

TP-Link’s current VIGI troubleshooting flow likewise starts with power, physical link, subnet/IP checks and network-device restart order: VIGI camera discovery troubleshooting.