Chosen Solution

I got one of these a couple years ago and would like to turn there monitor on it into a second monitor.

Alban de Montlivault you would need to continue using the current display board for the LCD screen. Since this kit is based on a Raspberry Pi you would have to somehow bridge the signal from your primary display to this display which could be as simple as connecting it to an HDMI port. Give it a try and see what happens.

Yes. You would have to provide power and a HDMI input, but it is possible. You may also hook it up to a gaming system.