I’m so glad I found your posting! Thank you so much! I have the exact same model installed in 2016. A few days ago, the control panel also started beeping and flashing red light every 5-10 seconds. My garage door still opens though. The beeping sound was driving everyone nuts. I called the garage door company and they called LiftMaster and told me I need to buy a replacement control panel (~$85). After pressing for the cause, they finally told me the capacitors went bad. I then followed your recommendations and bought the parts from DigiKey. Everything worked like a charm! So happy I’m not adding to the electronic waste land! Thank you so much!
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