Want to update this hot tub tv setup

I'm not sure if this is the section for this but here it goes. I have a older hot tub from 2001 with a built in tv, I want to update it with display board (if that's what its called?) to accept 2 or so hdmi inputs. I will also need a rca audio out ports, the output for the lcd backlights for the inverter, someway to give it power.

I'm sure its possible being the lcd monitor is a Samsung LTM150XH-L01 industrial display.

Here is some pictures of what im working with Thanks!!!