Quoted from Trekkie1978:
Did Stern redesign the newer boards, or does Iron Maiden have the zip tie fix?
ZIP tie. Just took home my IMDN Premium. I noticed the ZIP tie in diagnosing my out of box issue: bottom half of playfield has all insert lights out. Connectors good. Node board is likely defective. "Super reliable, robust, yada yada." Sure. So robust that the boards are warrantied for a whopping TWO months.......from the date your distributor gets the machine, not when you buy it.
Pro-Tip: If your warranty is 2 months, your product is not robust. In fact, it means the exact opposite.