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Hi guys, I have a mid 2012 MacBook Air 13", yesterday the battery started to not able to hold charge. The battery has eventually dropped to 0% but was still able to boot slowly with the power adapter but now it has totally died. The mac won’t boot at all with or without battery, no beeping, no startup chimes, just nothing at all. Only thing that shows is the orange light on the MagSafe. I’ve tried resetting the SMC and booting with and without battery but nothing is working. Any idea guys? Thanks. Ken
I am working on the exact same model machine right now. Mine will not boot with a dead battery either. I replaced the battery with a know good one and it booted. I also noted that it can take up to 30 seconds to tone. MacBook Air 13" Mid 2012 Battery Replacement
