When troubleshooting a single set-back box (SBB) or digital terminal adapter (DTA), what is the first step?

The first step in troubleshooting a single set-back box (SBB) or digital terminal adapter (DTA) is to check the power connection. This is crucial because if the device is not receiving power, none of the other troubleshooting steps will be effective. Ensuring that the device is powered on verifies that it's functioning and helps to isolate the issue.

Once power is confirmed, you can then proceed to other steps, such as verifying cable connections or resetting the device as needed. Inspecting the cable connections comes next, as loose or damaged cables can easily contribute to issues. Accessing another room may be helpful if the problem is widespread or if it’s necessary to compare the functionality of a working device; however, it is not the immediate first action in troubleshooting.

By prioritizing the power connection, you ensure that you are starting the troubleshooting process from a foundational element—ensuring your device has power—before moving on to assess the other potential causes.