MacBook will not start with battery installed.
I have a 4 year old macbook with it's original battery. Last week it stopped working. It will only power on for a few seconds before shutting itself down, regardless of whether or not the power adaptor is plugged in. The computer starts and works fine when plugged in with no battery installed and if I install a battery when the computer is already on, the battery status displays the current charge and says "battery not charging." The behaviour is the same using a new replacement battery.
Anyone seen this before or have any ideas?
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