I’m also trying to program the 2-pack of Solid Remotes I ordered off of Amazon (remote model # C-SP-390). I have a Chamberlain/Lift Master garage door opener with a part # of 41AC050-2. The remote I have that came with the system has a number on the back of HBW1573 (I believe is what it says, but the numbers a a bit worn off). I have an orange Learn button. It blinks intermittently before pushing it to illuminate it for the 30 seconds. I have tried all 4 buttons on the Solid Remote as per the directions on the box, but it doesn’t work. My other 2 (original) remotes still work and the wall plate works, but programming the 2 new Solid Remotes don’t work. Can you help? Thank you in advance!