If you haven't found a direct link yet, these specialized technician communities often host "rar" archives for this specific board:

(Insert your panel number here, e.g., V400HJ6-PE1) File Type Needed: .bin or .rar (full dump)

: Often contains threads dedicated to the MS3663S series.

If you have the (found on a sticker inside the TV), I can help you narrow down the exact firmware version!

Below is a template for a forum or social media post you can use to request or share this file. Cristor 40LH420 Firmware Dump [MS3663 PB801] Looking for Download: DUMP Cristor 40LH420 - Mainboard TP.MS3663S.PB801 Hi everyone, I am looking for a working SPI Flash Dump for the Cristor 40LH420

mainboard) is a common step for technicians trying to fix "bricked" LED TVs or software loops.