The "top" firmware for the 40MS801AMAC2HG is rarely a single universal file. It is a specific match between the board's SoC and your screen's hardware. Always back up your current "dump" using a programmer like the RT809H if possible before attempting a USB override.
Plug the TV back in while holding the button until the "Software Updating" screen appears. 40ms801amac2hg firmware top
Are you currently stuck on a specific error, or are you just looking for the download link itself? The "top" firmware for the 40MS801AMAC2HG is rarely
: Fixes for common crashing issues in pre-installed streaming apps like Netflix or YouTube. HDMI Handshaking 40ms801amac2hg firmware top