The most frequent culprit is a poor Digital Terrestrial Television (DTT) signal. Because digital signals are "all or nothing," even a slight shift in your UHF antenna can trigger an STB1 lockout.
Try a different HDMI port on your TV or a different high-quality cable (v2.0 or higher). Verify Account Status If the issue persists, contact your provider's support team mytv error code stb1 high quality
Missing or weak elements
If your internet speed is not the issue, but you still get STB1, your TV might be forcing a resolution the stream cannot sustain. The most frequent culprit is a poor Digital
Corrupted cache files are a frequent cause of STB errors on Android-based boxes and Smart TVs. but you still get STB1