: Insert the USB into the TV's white USB 2.0 port. Navigate to Settings > Support > System Update > Upgrade from USB .
: Unplug the TV from power. Insert the USB, then plug the TV back in while holding the Power button on the remote until the update screen appears.
To obtain the firmware for the (main board RSAG7.820.6735 ), it is highly recommended to use official sources rather than third-party multipart RAR files, which can be unreliable or corrupted. Official Download Method Download RSAG7 820 6735 HISENSE H40M2600 part01 rar
If your TV is stuck on a logo or cannot update over the internet, follow these steps: : Use a USB drive formatted to FAT32 .
: If the download is a compressed file (like a .zip or .rar), extract it using tools like WinZip or WinRAR. How to Install via USB : Insert the USB into the TV's white USB 2
: Copy only the firmware file (often named upgrade_loader.pkg or similar) directly to the root of the USB drive; do not put it inside a folder. Trigger the Update :
and your serial number to find the specific firmware version compatible with your hardware. Insert the USB, then plug the TV back
: Find the serial number on the sticker at the back of your TV. Visit Hisense Support : Go to the Hisense USA Support or your local country's Hisense support page. Search by Model : Enter