MacBook Pro 2012 start up problems
I was using my Mac with a extended screen when I closed the screen and laptop went to sleep and woke up the next day and tried to use it and it wouldn’t turn on. It makes the chime noise but then shuts down again. If I do manage to have it start it goes into a login screen with a safe mode type of a login but I still can’t login. I tried erasing the hard drive by going into system recovery. It didn’t let me do it. The way I accessed system recovery was through the menu bar on the top left. I replaced the battery because someone recommended that maybe it’s a power supply issue. But no help.
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Lets see what the on board diagnostics tells us. Restart your system and press the D key. Do you get any errors?
Reference: Mac startup key combinations
door Dan
@danj
Problem is when I power it, it chimes and I hear the fan with a black screen for a while and I feel heat under the right side of the keyboard. I have to wait for a while before it starts booting. Once screen turns on first thing happens is it loads with the apple logo then goes into reset password window and the white light in front is off during this whole process.
I tried recovery assistant to erase Mac and I get a message “Couldn’t open device. : (-69877)
door Mjer