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1.6 or 1.8 GHz dual-core processor, 2 GB or 4 GB of SDRAM, 64 GB or 128 GB SSD

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Installed new battery, but not charging

I recently installed a new (aftermarket) battery in my MacBook Air 11" after the original battery stopped working.

After replacing the battery status reads Replace Now. Not charging.

After some research I decided to replace the i/o board but unfortunately I get the same result.

Suggestions? Should I assume the new battery is faulty? Or should I try replacing the i/o board cable as well?

Update (09/30/2015)

In addition: I have tried two different MagSafe chargers and also reset the SMC twice.

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Try a PRAM reset holding alt, cmd and R+P on start up until your hear the chime again. This should enable the macbook to attempt to charge, failing that clean the charger ports well with alcohol using a paintbrush/toothbrush - then try again. This has worked for me in the past. Alternatively you may have a faulty battery - aftermarket ones can occassionally arrive without charge.

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