<strong>Power / Volume Flex Cable for Nintendo Switch Lite</strong>
This is the flex on the top of the console that sends the button signals to the console's sub-board, and then to the mainboard.
If either the volume up, down, or power buttons don't function, it could be possible that the traces on this flex were corroded or damaged, or that the button trigger itself physically broke
Many times the symptoms of a faulty power / volume flex are the same as the symptoms of a damaged trace on the sub-board, damaged sub-board to mainboard FPC, or damaged / bent sub-board to mainboard flex cable