Quoted from CrashJT:I looked everywhere visible and didn't see anything on the boards. I wrote Stern to see if they know, but right before I sent it, I ran through all the LED tests. The RGB LED pointing into the upper scoop is dark on all 3 colors. I'm guessing that's an RGB LED from that board? Asked Stern to confirm. Thanks all. Will let you know what I hear.
Since you've already looped Stern in, maybe you've got this all figured out, but your plea piqued my curiosity so I took a look, and yes...the RGB modules look like the thing you took a picture of. I admit it does have a similar shape to the SMD inductor components (suggested by someone else), but those are much larger, with part #'s printed on them.
You mention the upper scoop arrow insert lamp being out. Here's a photo of what that component (LED12 on board 9A, framed in red in the photo) looks like on my machine:
LED12 on board 9A, framed in red
On my board, the LED package has a white base, but otherwise it (and all the other RGB lamps) looks pretty much the same as the component you asked about. Minor differences in packaging like that wouldn't be unusual, especially these days with manufacturers getting electronic components from wherever they can at any given time.
I'll bet if you unfastened your own 9A board and (carefully, so as to not scrape any other components off the board by accidentally hitting something hard on the playfield underside) turned the board over so you can see where LED12 is, you'll find it missing.
I'm sure you can easily figure out where the board is, given you already know which lamp is not working, but just to be complete here's the board layout drawing from the machine manual showing where board 9A is on the underside of the playfield. The board itself is labeled "6", but that's just the ID on the table on the page. The board's actual name is "9A":
playfield bottom, board 9A framed in red
If/when you confirm that's where the component came from, I'd guess you shouldn't have any trouble getting Stern to replace the board. It's not feasible for the average person to remount a SMD component in the field, and assuming you never had the board off, the component coming off like that would only be some sort of manufacturing error.