MacBook Air 4,2 A1369 would not power on the other day. Removed back of laptop and disconnected battery. It booted spontaneously when the magsafe power adapter was connected. It will also boot spontaneously when the battery is reconnected with the power adapter connected. It will then continue to run for hours on the battery AFTER the power adapter is disconnected. Battery cycles are just under 1,000. Previous to failure the battery was easily lasting 4 hours. I am unable to execute a PRAM or SMC reset because the only time I can get it to boot is after a battery disconnect... when the power is reapplied it boots on its own and ignores any keyboard input.
Any ideas? I am inclined to replace the battery and see what happens.
Any ideas? I am inclined to replace the battery and see what happens.