# 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 --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://help.verkada.com/access-control/troubleshooting.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.