Chosen Solution
I installed a new battery, it’s a Newertech NuPower Battery. After installing laptop wouldn’t start. Took apart again, re-checked connections, still nothing. I re-installed old battery, still nothing. I did the SMC reset, and it started. After a few minutes I shut down and tried re-starting and nothing. The SMC reset did nothing. I will add that we were having problems with trackpad. I detached the 2 cables, than realized I didn’t have the right screwdriver. Putting the cables back was a real dog, especially the wider one. Would that be causing the problem? Is it possible they are not in right? I noticed when I did get it started that the battery was 100%.
The wider cable is the keyboard connection as well as the power button. So if it’s not properly connected the system won’t turn on. Once you have the proper tools carefully reset the cable. This time take a strip of electricians tape fold over one end to make a pull tab place the tape onto the ribbon below the contacts to help you pull the ribbon into the connector. Do make sure you’ve not damaged either the clasp or the ribbon cable as that will do you in!
