liftmaster door opener gives constant blicking light and clicking sound

Liftmaster malfunctions with unknown reasons. Symptoms and model number are given in the attachments. Sensors around the ground are solid green/orange. Pressing on buttons on the wall control leaves no response. Would like to know whether this is a trivial issue I can solve myself, or something serious enough to contact a garage door professional.

Could be the logic board. Have you tried unplugging the opener for a few minutes and then plugging it back in? That will usually reset the unit. If it still does it then you may want to take the logic board out & see if you can see any type of burn marks on it like a power surge may have damaged it. Or you could call a professional service company to take a look at it.

Thank you, Brian! I have unplugged it for a day and then plugged it back. After a few minutes, it made the same noise with the garage door non-operable.