In a search on eBay for that Astec p/n seems the power supplies made in Hong Kong have the two rivets you shared in the image.
Those manufactured in Malaysia have screws all around. Seems to be an tampering deterrent and or warranty void indicator to me. If they are aluminum pop rivets, they should drill out easily. Don Resor Sent from someone's iPhone > On May 10, 2021, at 3:07 PM, David Williams via cctalk > <cctalk@classiccmp.org> wrote: > > Anyone have any idea on how to open this particular Apple II PSU? It is a > Astec AA 11040B and has like a rivet on each side in the middle. All the > other supplies I've messed with just had screws along the bottom. Trying to > remove the bottom of the casing so I can work on the supply itself. Link to a > pic of it. > > Thanks for any help. > > http://www.trailingedge.com/images/A2PSU.jpg > > David Williams > www.trailingedge.com >
