Always check the manufacturer's site for the most recent official firmware updates if available. To make sure you get the right file, can you confirm: Does your TV model end with -SM? I can help identify the best source based on this info. POLARLINE TP.MT5510S.PB802 40PL11TC-SM
Offers a dedicated dump for this exact model and mainboard. Remont-aud.net : Provides another version of the dump. Download MT5510S PB802 1920x1080 40PL11TC POLARLINE zip
Based on your request, the firmware for the (TP.MT5510S.PB802, V400HJ6-PE1, 1920x1080) can be found in technical service databases. Key Resources to Download the Firmware: Always check the manufacturer's site for the most
Ensure your TV specifically uses the board and the V400HJ6-PE1 panel to avoid damaging the device. the firmware for the (TP.MT5510S.PB802
Lists parts and potential service support for this mainboard. Important Notes: