Numerous battery + screen problems
The battery in this MacBook was recently replaced around December 2019. An official Apple battery was used. Recently, it has started draining extremely quickly and will only run for around 10 minutes. My battery health (CoconutBattery) is down to 9.9%, and whenever I unplug it, it shows that it is running on reserve battery, no matter the percentage.
I also recently upgraded to MacOS High Sierra from Sierra. Since then, when I close the lid and re-open it, the screen does not turn on. The keyboard backlights comes on and sounds play, but the screen does not. I have to fully shut it down whenever I wish to not use it, instead of just putting it into sleep. Also, I cannot change the screen brightness. Nothing happens when I press the brightness keys, and nothing happens when I try to change it from the command line.
I’ve tried numerous remedies, such as resetting the SMC and PRAM. None have worked.
My temperatures also seem to be extremely high some of the time, triggering the fans to spin extremely quickly and loudly.
Is this a good question?