Chosen Solution
Hello, I have a macbook 8,1 A1278 i5 2,3ghz model. I currently am running it without a battery, previous one swole up. Sometimes the keyboard and trackpad stop working (they show up in System Profiler tho). They work fine at startup, when holding alt key and selecting a dive, but once it is in the system, they don’t function even though they are detected. Grabbing the device fixes the issue tho and it works fine. Any idea what may cause this issue is appreciated, thank you
If the battery swelled then the trackpad ribbon cable is likely damaged. I would start there replacing the trackpad Unibody Macbook Pro 13" trackpad and flex cable. Of course you’ll also need a new battery as well MacBook Pro 13" Unibody Early 2011 Battery Replacement. You may still sendup needing a new keyboard as well.
