If the firmware update causes issues:
Do not turn off the TV or unplug the power during this process. ⚠️ Important Safety Tips unplug the power cord while the update is installing. The TV may restart several times; this is normal. Firmware Change Update on SONY KD-43X8309C
Extract the file and copy the .pkg file to the of a FAT32-formatted USB flash drive. If the firmware update causes issues: Do not