First step was to disassemble the case and remove the old CRT etc (this TV has not been plugged in for over a year but still dropped a screw driver across the main capacitors). Keeping the mainboard etc for measuring. There is plenty of mounting brackets that I can be reused.

Next getting the arduino micro to emulate media keys, luckily Nico Hood's project https://github.com/NicoHood/HID covered that and getting a prototype up and running proved fairly straight forward.

Ubuntu Mate 16.04 (target OS) proved a little more difficult as it keeps trying to use the internal LVDS as the primary monitor. Have yet to solve this issue, however it might not be one if the LCD panel I plan to use can connect directly to the LVDS socket on the motherboard.