> For the complete documentation index, see [llms.txt](https://help.verkada.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.verkada.com/access-control/troubleshooting.md).

# Troubleshooting

- [Access Controller Hardware Checks](https://help.verkada.com/access-control/troubleshooting/access-control-hardware-checks.md): Learn how to perform physical checks to troubleshoot your Verkada access controller
- [Offline Operation](https://help.verkada.com/access-control/troubleshooting/access-control-hardware-checks/verkada-access-offline-operation.md): Learn what happens to an access controller’s functionality during an internet outage
- [Troubleshoot Immediate Door Relock](https://help.verkada.com/access-control/troubleshooting/access-control-hardware-checks/troubleshoot-an-immediate-door-relock.md): Learn how to troubleshoot when a door’s unlock time is shorter than expected
- [Restart an Access Controller](https://help.verkada.com/access-control/troubleshooting/access-control-hardware-checks/restart-an-access-controller.md): Learn how to reboot your Verkada access controller
- [Reader Connectivity Status](https://help.verkada.com/access-control/troubleshooting/reader-connectivity-status-on-command.md): Use reader connectivty status to verify your reader integrity
- [Card Reader LED Behavior](https://help.verkada.com/access-control/troubleshooting/reader-connectivity-status-on-command/verkada-card-reader-led-behavior.md): Learn about the LED light behavior on Verkada card readers
- [AC41 Status LED](https://help.verkada.com/access-control/troubleshooting/verkada-ac41-status-led.md): Learn the status of the Verkada AC41 LED codes
- [Use the AC41 Test Buttons](https://help.verkada.com/access-control/troubleshooting/verkada-ac41-status-led/use-the-ac41-test-buttons.md): Learn how to use the AC41 test buttons for setup and troubleshooting
- [Configure Dry Lock on AC41](https://help.verkada.com/access-control/troubleshooting/verkada-ac41-status-led/configure-dry-lock-on-an-ac41.md): Learn how to set up dry lock on an AC41 that does not lock or unlock as expected


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