Apple ][+ problems

Yesterday, i recieved 3 apple II+
One works pretty well buy I have an "Expandaram" card that wont work with it.
The second one just boots to a screen that's just one solid blank color.
The last one was working for awhile, I was using it and went to wiggle disconnect a cable on the inside, my hand slipped and hit one of the cards, knocking it out of a slot, no the computer shows just 4 bars on the screen. I don't know what i killed on the motherboard, but i hear that pretty much every chip is still available except the roms.