The exact button sequence varies slightly depending on whether your TV is functioning normally or if it is stuck on a blank screen. Method A: For Functioning TVs (Menu Method) Turn on your Toshiba TV.

Locate the exact model number on the back panel of your Toshiba TV (e.g., 43LF621U21 or 55C350KU).

If your firmware file is larger than 4GB, FAT32 cannot hold it. This confirms your TV uses a *.pkg installer that is split across multiple files or requires a Windows-based installer tool. Do not force it.

Plug a USB flash drive into your computer and format it specifically to FAT32 .