The "" at the beginning of the identifier stands for " Taiwan PCB " or, more generically, " type ," but it universally signifies a mainboard model code. The full code TP.RD8503.PA671 specifies the combination of the chassis processor (RD8503) with a specific board layout and panel interface (PA671).
You installed the board into a new TV casing, and the screen colors are inverted, mirrored, or completely scrambled. tp.rd8503.pa671 software
Comprehensive Guide to TP.RD8503.PA671 Firmware: Installation, Troubleshooting, and Recovery The "" at the beginning of the identifier
While holding the power button, plug the TV's power cord back into the wall socket. Comprehensive Guide to TP
When installing a new universal board into an existing TV shell, the board must be flashed with software that matches the specific resolution and bit-rate of the LCD panel.