If it is all original, you'll want to be careful with the power supply. It's known to fail in a way that over voltages. Replacement ones can be made or bought relatively inexpensively.
That was also in the back of my mind. Even back in the 80s, I remember those bricks being a source of heat and... shock sometimes. I'm just not a hardware guy, so gave it to someone who I think loves tinkering with that sort of stuff... :)
