Installing the wrong firmware for a similar model (e.g., KALED553DSMTZB ) can permanently damage the hardware. Always verify the product code on the sticker at the back of your TV before proceeding. KALED55SMTZA - Firmware Update - Kogan.com Help Desk
Keep holding the button until a appears with the text "Upgrade Software Do Not Turn Off".
Use an empty USB stick, preferably 8GB or smaller , formatted to FAT32 .
If you are downloading this file to fix software issues or "unbrick" the TV, follow these official Kogan Help Desk instructions:
The file you mentioned is part of a split .rar archive (indicated by "part2"). To use it, you must have all subsequent parts (part1, part2, etc.) in the same folder before extracting. However, for most maintenance needs, provides a single, unified firmware file directly through their support channels.
Android 4.2 (Dual-core 1.2G CPU, Mali400 Quad-core GPU).