MacBook Pro Will not Boot up
MacBook Pro Will not Boot up
My MacBook Pro will not boot up. I replaced the battery thinking that may be the cause. It does not even attempt to boot up. Any ideas?
[Edited by Moderator]
MacBook Pro
It would help to know the exact model of your Mac and version of macOS being used. You can get the exact model by entering the system serial number here:
Check Your Service and Support Coverage - Apple Support
Is this a third party battery you installed yourself (what brand?), or did Apple or an Apple Authorized Service Provider replace the battery for you? The quality of third party Lithium-ion Batteries is extremely poor so if you installed a third party battery, then this could still be the problem. Plus many people accidentally damage their laptops when replacing the glued in battery. Or the battery was never the source of the problem (or not the only problem).
It is very important to differentiate between booting and powering on. Does the laptop show any signs of powering on such as a startup chime, does the CAPs lock key light up, or hearing the fan, or feeling any heat (even a slight warmth) around the middle (left to right) of the bottom case maybe a few inches in from the back edge? If so, then the laptop has power.
If it is a USB-C model laptop using a USB-C charging cable, do you hear the "ding" sound when connecting the charger over USB-C? Definitely try another USB-C port especially on the other side of the laptop. Try an SMC Reset (only for Intel Macs, plus read the instructions carefully since the procedure has changed with later models). Try unplugging the charger from the electrical outlet for a minute to reset the charger's internal circuitry. Here are two Apple articles for troubleshooting charging issues:
If your USB-C power adapter isn't charging your Mac laptop - Apple Support
If your MagSafe cable or power adapter isn't working - Apple Support
Disconnect the battery from the Logic Board (both the flex cable & BMU screw for 2016+ models) and try powering on the laptop using just the charger. Without the battery connected the laptop may run extremely slow...so slow that it may take hours to finish booting, but the laptop should power on if there are no other hardware issues.
Here is an Apple article for troubleshooting macOS boot issues:
If your Mac doesn't start up all the way - Apple Support