I have the main board out and I don't see any caps by the processor. The only caps I see on the board are the x2 25v 10uf and the one 16v 47uf.
The CPU is in IC90 I have figured. I don' have a chip in IC4 or IC64-99 or RN6.
On the expandable memory board PC357 I have only chips in sockets IC54-57.
This is a model 2212. It really does not show any signs of someone messing around inside of it.
I just have that blank screen. I do see the blue backlight in it.
I did find the piece of the metal floppy cover in the floppy drive flopping around. I got that out. I'll check on seeing what happens when I unplug the floppy and power it up.
thanks,
Tom