Tp.mt5522.pc821 Firmware [2021]
Hold the power button on the TV or remote and plug in the power cord; a blinking standby light usually indicates the update has started.
If your manufacturer’s website is offline, try searching: Tp.mt5522.pc821 Firmware
Because this is a generic board used by many manufacturers, "official" firmware depends on your specific TV brand. However, general firmware and recovery tools are often shared on technician-focused platforms: Hold the power button on the TV or
Release the power button once the indicator LED begins to blink rapidly, signaling the update is in progress. Tp.mt5522.pc821 Firmware
or checking archive.org for the original support page.