Save the configuration with write_store and perform a soft reboot: reboot -s .
Because P45-53v3.1 Software is considered "end-of-life" by the original manufacturer (EOL announced March 2021), official support is minimal. However, a robust user community exists: P45-53v3.1 Software
If the TV still boots, you can often place the allupgrade_...bin file on a FAT32-formatted USB drive, plug it into the TV, and power it on while holding the physical power button to trigger an auto-update. Save the configuration with write_store and perform a