In some examples (not illustrated), multiple support arms 622 may be joined together at one end thereof, like branches diverging from a common trunk. For example, two support arms 622 that are separate at their first end (the end connected to the engagement bar 626) may join together and share the same structure at their second end (the end connected to the hinge 623), forming a “Y” like structure.
The hinge 623 may comprise a bracket 625 and pins 624. The pins 624 engage sockets in the bracket 625 and are connected to at least some of the support arms 622 such that support arms 622 can rotate relative to the system board 2. The bracket 625 may be affixed to the system board 2 (see