Please do not press the learn button, you can wipe the openers memory completely doing that if you hold it for more than 6 seconds.
The learn button is used only for learning remotes to the opener.
I am still unable to find your model anywhere, even at Guardian, it ois so strange they do not even show it in the database.
Have you unplugged the opener from power for 10 minutes and then replug and see if that resets the unit?
That does reset some openers when they get hung in a situation, like rebooting a PC.
You are getting alight and beeping, so the power supply must be good.
It is almost like a relay is not engaging the motor drive.
I will search some more, but may have to put the question back on the board for other experts if I am unable to find a manual.
They are all similar, but the components are different
Appreciate the understanding