For the B820CA15 specifically, the most common "fix" sought by enthusiasts is replacing the provider's firmware with a "clean" Android TV ROM.
Navigate down to and select it. Confirm the action by selecting "Yes". Navigate to Wipe data/factory reset . zte zxv10 b820ca15 fix
Appendix B — Common default values (may vary by ISP) ZTE ZXV10 B820CA15 Fix: A Comprehensive Guide For
He cracked the casing—a satisfying snap of plastic—and peered inside. The motherboard was a miniature city of silicon and solder. He spotted it almost immediately: a tiny capacitor, near the power input, slightly bulged at the top like a loaf of bread that had risen too high. A "blown cap." A classic failure. Symptom: Device powers intermittently or not at all
If your box is having trouble streaming or connecting to the internet: Reset Network Settings : Navigate to Network & Internet