Try a different USB port or a different brand of USB drive. Some boards are picky about high-speed USB 3.0 drives.
Using the USB method is the most reliable way to "fix" a corrupted board without specialized programmers. tphv553pc821 software download fixed
If the software works but the image is inverted, you must enter the Service Menu (usually Input + 208 or Menu + 1147 ) and toggle the "Mirror Mode" setting. Try a different USB port or a different brand of USB drive
Press and hold the on the TV keypad (not the remote). While holding the key, turn on the main power switch. If the software works but the image is
Understanding your hardware is the first step to avoiding a "brick" during the update. TP.HV553.PC821. Resolution Support: Up to 4K (3840 x 2160). Interface: Triple HDMI, Dual USB, LAN, and AV inputs.