Chosen Solution
The health of my battery is great, only 77 cycles and long operating life. However, I just finished taking off my bottom panel for the first time and cleaning my fans (much needed) and upon putting the panel back on…. the magsafe light is NOT coming on and the battery is no longer receiving power when the cable is connected. Please help! Thank you for your time and potential response, it is highly appreciated!
Fixed: per Apple support. “Unplug the power adapter from the wall, let it sit for 60 seconds, then plug the adapter back in. If the adapter works after this 60-second “rest”, you most likely have a line noise issue with your power source. You should reset the adapter periodically by repeating this moment of rest. This issue occurs when the AC adapter’s “over voltage protection” feature senses ground noise and then turns off the adapter.” https://support.apple.com/en-us/HT203207
If your a good tech, the first thing you do when you take the bottom off is unplug the battery. Did you do that and then forget to plug it back in?