Because this is a specific board-level firmware rather than a consumer-facing app, it is usually found on technician-focused platforms:
: While there is no single official site, technicians often find these files on community forums like Monitor.net.ru or through specialized Telegram channels like lcd tv led tv smart tv software Prepare a USB Drive Format a USB flash drive to Copy the firmware file (often named MstarUpgrade.bin or similar) to the root directory. The "Force Update" Procedure Insert the USB into the powered-off TV. Press and hold the button on the TV (not the remote). nm368818 firmware free
: Turn the TV on. The board should detect the file and start the update process automatically (often indicated by a blinking standby light). Because this is a specific board-level firmware rather
“NM368818 is not a standard model number — it’s likely a PCB marking. Check your device’s sticker for the real model (e.g., ‘TL-WR841N’ or ‘HG8540M’). Free firmware is available from the manufacturer’s support site or OpenWrt if the chipset is supported. Never pay for ‘firmware download’ — that’s a scam. Provide a boot log via serial console, and the community can help identify compatible free firmware.” : Turn the TV on
turn off the power during the update, as this can permanently "brick" the controller board. samsung.com