Disconnect the power. Press and hold the on the TV panel, then plug it back in.
This is the first segment of a compressed archive. You will need all subsequent parts (part02, etc.) to successfully extract the full firmware file. How to Use This Firmware Download HV553 PC821 3840x2160 Ref90 Pakistan part01 rar
Once the blinking stops or the TV restarts, the software is updated. Disconnect the power