Aargh, I reckon I've always been on the wrong (?) side.
I'm a ZX Spectrum to Atari ST type but always enviously glanced at the Commodore colour and then the Amiga gfx chip capabilities...but I liked the rubber keys etc
Have a look at
https://www.youtube.com/watch?v=0qC1G8Q6jwA
This chap is awesome and very interesting in his diagnosis methodology.
Stu