My MacBook Pro early 15 won't turn on if the battery is connected.
I can turn it on only with the power supply.
If I reconnect the battery while it is running on power supply, it can continue to run on battery only.
The battery is new.
Any suggestions??
MacBook Pro 13″, macOS 12.5
If Apple or an AASP installed the battery, then you have 90 days for them to make things right.
If you replaced the battery with a third party battery, then the replacement battery is likely bad, or the Logic Board was damaged while replacing the battery. The quality of third party Lithium-ion Batteries is extremely poor even when purchased from a reputable vendor such as OWC which is why I will always choose an original Apple OEM battery whenever they are still available. It is hard to say which of these two parts is bad without trying a known good battery, although the battery is usually the weakest link, but it is also easy to damage the Logic Board on this model when removing the battery.
Hi HWTech
Thank you for reply.
I don't think that's what happened.
I replaced the battery with an oem battery about a year ago and it has been working fine until now. But you are probably right that it could be the motherboard's smc chip that is broken.
Yes I have tried that.
Macbook cannot turn on with battery connected
