Chosen Solution
Was doing some work, my screen went black and it turned off. I reset it, turned it back on and the fan has been running full speed, the charger won’t connect (no light to indicate a charge) and the top right no longer shows my battery (when it’s plugged in or not). On system Preferences under Energy Saver when I click “Show Battery Status in Menu Bar" it immediately un clicks it self. As well as says “Current Battery Charge: 0%” again even when it’s unplugged.
Follow these steps to access information about your Mac notebook battery, including its cycle count: Hold the Option key and click the Apple () menu. Choose System Information.Under the Hardware section of the System Information window, select Power. The current cycle count is listed under the Battery Information section. so maybe you need to replace it
