I am sorry that you are not able to hear your Slingplayer after changing cable boxes. The more information that you can provide us with, the better we can assist you. Please answer the following questions:
- What device are you using to stream?
- Does this only happen on a specific device?
- Have you checked your audio cables?
- Have you tried using different cables?
For further reference, please review the articles below:
- Slingbox audio issues: Basic troubleshooting
- How audio and video passthrough works on your Slingbox
- When you add or change an audio/video device to your Slingbox, you may not get a picture or sound. Why?
Sling Media Support Team