The final pages of a Starsat manual list error codes. Here is a consolidated version:
Secure your satellite cable to the LNB IN port. Use an HDMI cable for modern TVs to ensure 1080p or 4K quality, or use RCA (AV) cables for older sets. starsat user manual better
Check the LNB cable connection. Ensure the dish hasn't moved. Check dish settings for the correct satellite. The final pages of a Starsat manual list error codes