( Log Out /  My garage door does not see a lot of use, so I got 4 years before mine started acting wonky. Here are some pictures of the old and the new. Disconnect power. Liftmaster is well aware of this problem and are issuing warranty replacements with no questions asked, which is the right thing to do. Note: The 888LM and 889LM* are not compatible with Commercial door or gate operators. I initially just figured one of the photo eyes for the light beam were out of whack so I readjusted them back to specs with no improvement in my little issue. They may be low-ESR but I don’t care to bust a meter out to find out. Ruptured and leaking capacitors do not represent an optimal working condition. Disconnect power. Unplug the garage door opener and remove the battery if applicable. One exception is the ATS model commercial door operator. ( Log Out /  Note: The 888LM and 889LM* are not compatible with Commercial door or gate operators. I was also fortunate that the problem issues I was having were not as bad as some others have reported, namely the control panel shorting out and raising the door while no one is at your home or business. This post has been more of a public service more than anything. One exception is the ATS model commercial door operator. Ruptured and leaking capacitors do not represent an optimal working condition. ( Log Out /  ( Log Out /  Change ), You are commenting using your Twitter account. The 888LM allows you to control all your doors & home lighting systems. Discover the 888LM, garage door wall control from LiftMaster. I went ahead and fixed my existing 888LM anyways. Fill in your details below or click an icon to log in: You are commenting using your WordPress.com account. A picture of the ‘improved’ caps on the replacement board from Liftmaster. Change ). Here are some pictures of the old and the new. Change ), You are commenting using your Facebook account. ... To resolve issues with the myQ enabled door control panel. Liftmaster is well aware of this problem and are issuing warranty replacements with no questions asked, which is the right thing to do. Other than the voltage rating on these new caps being 3V instead of 2.5V on the old caps, I see no immediate difference. Documentation of Stupid Electronics Projects. Unplug the garage door opener and remove the battery if applicable. After a lot of other troubleshooting and a lot of digging online, I discovered that a pair of 1F supercapacitors in the older 888LM units are guaranteed to fail almost 3 years after the control panel is installed. Some staining to the PCB, but the electrolyte didn’t have a chance to eat any pads or vias, yet….. New ‘no-name’ supercaps that will likely fail in 3 years, so I felt no desire to order top shelf components knowing that it is likely a poorly–engineered circuit design leading to component failure. I went ahead and fixed my existing 888LM anyways. 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