Octaviascot

Hi all, I have a 21 plate Skoda Octavia iv. It's just started doing the thing where the infotainment system goes wild, randomly switching on and off, muting etc. Makes it really hard to drive as the screen controls the AC (awful design). Seems that the hot weather has triggered it and the screen is now overheating, the screen was roasting yesterday. It's the H44 model that seems to be known for problems, whoopee. So we're planning to replace the screen. My question is, is the screen dumb? From what I've looked up it seems that the brains of the car rest elsewhere. Is the screen just a dumb display? Can I plug in a new one and away it goes, or does it need re-coding by a garage? Replacing it is very much in my skill set, I've done other similar things on my old Octavia, but I don't have a computer with the necessary lead and software to code stuff. Cheers