Liftmaster 1/2 HP Security +. Model # 1265-267. Have the serial # if needed. The ONLY way I can set up MyQ successfully is to hold the red button on my opener for about 6 seconds until the LED turns off. This clears all the codes from the opener. I can now successfully set up MyQ correctly. MyQ monitors correctly, and I can open or close the door with my MyQ app. That said, once I do that, my opener won’t let me reprogram my remotes or home-link. I’ve tried repeatedly, with no success. It seems like I am locked out of programming any other devices. The only way for me to successfully reprogram my remotes is to hold the learn button down for 6 seconds, erasing all codes again. Then, I simply press the learn button, hold down the button on the remote for 2 seconds, and it works again, as does HomeLink, instantly. But now, the MyQ app won’t open or close the door anymore. The only way I can get both the MyQ G0301 and my remotes to work is to set up MyQ in monitor mode only. The website stated no compatibility issues between this Liftmaster unit and MyQ G0301, but I think that is incorrect. Regardless, if I can’t get it to work fully, I will be returning it. Not worth $100 for just monitoring. Please help. Thank you.