Release the button once the standby light starts blinking or the update screen appears.
Wait for the process to complete (the TV will typically reboot or the light will stop blinking). Board Specifications HI3751V553 (Dual Core A73) OS Android 7.0 Resolution 4K Ultra HD (3840×2160) Memory 1GB RAM / 8GB ROM Download HV553 PC821 CLEVER 55JP55UAS rar
Provides order links for various universal LED TV board softwares. Installation Instructions Release the button once the standby light starts