I apologize for the long post but I've tried so many options I'm at my wit's end and wanted to provide as much info as possible.
I have a mid-2014 Pro 13" (i5, 8 GB, 128 SSD, 982 battery cycles, healthy according to system report, 5173 mAh capacity, healthy, bootrom 157.0.0.0).
When I press the power button with or without the charger attached, it chimes, screen backlight comes on, no Apple logo, stays like this for about 25 seconds, reboots, chimes, backlight comes on for 25 seconds, reboots, chimes, etc. I never see the Apple logo appear but the backlight works. Makes no difference if the battery is or isn't connected.
When I press the power button with or without the charger attached, hold option key to select a boot drive, the drive options appear. I left it like this for about 5 minutes and nothing happens. As soon as I select a boot drive, machine powers off. After powering off, it will sometimes power up on its own and try to boot, power off, boot up endlessly. Makes no difference if the battery is or isn't connected.
With or without the charger attached, I am able to select Internet recovery, select a network, starts downloading files, and then powers itself off or reboots. I never see the Apple logo.
When I press the power button with or without the charger attached and run diagnostics, no issues are found.
I put the SSD from my Air into the Pro and it booted with Catalina which is how I was able to read the battery health, etc. I then decided to boot from a macOS install USD which was successful, erased the drive to do a clean install, and it went back to rebooting all the time as I stated above.
I saw a YouTube post from a repair shop that said a bad battery caused a similar problem with a 2015 15" Pro although this Pro showed the Apple logo before rebooting endlessly and replacing the battery fixed the problem completely.
I'm ready to smash this thing as I have spent so much time fiddling with it
The Apple store ran their tests and said the logic board needs to be replaced at a cost of around $600.
I have a mid-2014 Pro 13" (i5, 8 GB, 128 SSD, 982 battery cycles, healthy according to system report, 5173 mAh capacity, healthy, bootrom 157.0.0.0).
When I press the power button with or without the charger attached, it chimes, screen backlight comes on, no Apple logo, stays like this for about 25 seconds, reboots, chimes, backlight comes on for 25 seconds, reboots, chimes, etc. I never see the Apple logo appear but the backlight works. Makes no difference if the battery is or isn't connected.
When I press the power button with or without the charger attached, hold option key to select a boot drive, the drive options appear. I left it like this for about 5 minutes and nothing happens. As soon as I select a boot drive, machine powers off. After powering off, it will sometimes power up on its own and try to boot, power off, boot up endlessly. Makes no difference if the battery is or isn't connected.
With or without the charger attached, I am able to select Internet recovery, select a network, starts downloading files, and then powers itself off or reboots. I never see the Apple logo.
When I press the power button with or without the charger attached and run diagnostics, no issues are found.
I put the SSD from my Air into the Pro and it booted with Catalina which is how I was able to read the battery health, etc. I then decided to boot from a macOS install USD which was successful, erased the drive to do a clean install, and it went back to rebooting all the time as I stated above.
I saw a YouTube post from a repair shop that said a bad battery caused a similar problem with a 2015 15" Pro although this Pro showed the Apple logo before rebooting endlessly and replacing the battery fixed the problem completely.
I'm ready to smash this thing as I have spent so much time fiddling with it
The Apple store ran their tests and said the logic board needs to be replaced at a cost of around $600.
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