: Ensure the firmware version matches your specific board number (often found on a sticker inside the back panel) to avoid bricking the device. 2. Preparing the USB Drive

Downloading and installing firmware for an Smart TV typically involves gathering multi-part compressed files (like the part4.rar you mentioned) and using a USB drive to perform a manual flash . Because IRIS is a popular brand in specific regions like North Africa, official firmware is often hosted on community-driven technical portals rather than a single global manufacturer site. 1. Locating the Download

For the TV to recognize the update, the USB drive must be formatted correctly.

: Plug the USB drive into the TV's USB port (prefer USB 2.0 if available).