I am new to Apple II's and, recently, purchased an Apple II Plus off of ebay for a great price. There was no guarantee of it working, but, that's ok. It had 3 cards and the price was good. :-)
Inside the case, I found a mystery part and it looks like the picture below. I've been keeping my eyes open to try to figure out what it is. Now, I've found another one jammed under the keyboard. My thought is that it doesn't belong and a kid decided to put his toys in the computer. But, I am unsure.
Does this look familiar?
The Apple II Plus also had 3 cards; an 80 column card (connected to a toggle switch on the underside of the front keyboard section), a 16k card, and a parallel printer card. No chips are missing but the reset key is missing. The power supply is DOA and I am trying to fix it. New capacitors are arriving today.