MacBook Pro starts when plugged in. with battery/without battery also

"Seems like the common case of dead battery syndrome. When you get to your desktop, go to the apple logo in the top left, about this mac, system report find power on the left side and take a screenshot of what it says and post it here. If it says that condition is not normal, says theres no battery or if the cycle count is over around 600 your battery is shot and you need a new one. Do all of this ofcourse with the battery plugged in.

Hope this helps and good luck fixing!"

"on the left side of your mac you have a button with 7 lights, if you push the button, are all the lights going on or is there just one blinking?

if there are more lights blinking the battery is working, in that case it's most likely there is something with the keyboard.

it is possible that the keyboard cable isn't connected properly or damaged. or that your keyboard has fluid damage."

"I got the same problem. I have try reset SMC & PRAM, remove battery & RAM, reinstall MacOS High Sierra z which all does not work.

My battery condition show Normal & actually i just change the new battery two months ago only so it's new & does not charge many cycle.

I suspect might be because install some software & crush the system in MacOS high Sierra.

As after i upgrade the MacOS High Sierra, it's working normal but after I upgrade the software due to compatible problem. It start to have this problem. I had tried to uninstall some program but still some did not do it yet as I need to finish some project on it & I afraid can't get back the software later so did not try yet. After I finish the project, will back up the data & try to uninstall all the upgrade software.

Might be you can try if you got the similar situation or if you have already solved your problem, kindly keep me update.

I will update the result after I uninstall all the software too.

Let's keep in touch !"

I took my mbp to the icare and they removed the dead battery and then i start having this problem … my mbp 2011 start by itslef when plugged in .

"@yarangula URALI

Not sure if you ever solved this issue, but I am having 99% the same issue you are having.

The computer only turns on after I have unplugged the battery, and auto turns on after plugging in the mag safe power cord to the computer. The computer turns on without even pressing the power button.

This particular computer might have experienced some water damage as I had to replace the logic board to get it to even display a picture on the screen.

One way you could test to see if you have a faulty power button is to boot the computer, and see if you can force shut down the computer holding the power button down.

This is something I just tested, and just noticed I can not turn off the computer holding down the power button, so I am assuming there is something faulty happening with the power button."