If your Set-Top Box does not show all channels then follow the 3 simple steps to scan channels Step 1: Click the Menu button on Remote control and select Auto Scan Option Step 2: Fill the required fields like Constellation, Bandwidth, and Annex. If you don't know values then call the customer service at 988-5465. Then click the Start Scan button. Step 3: Wait 4 to 5 minutes to complete scanning.