Here are some solutions that you can try :
* ***Check the BIOS/EFI Settings***: After reassembling the laptop, make sure the BIOS settings, especially power-related ones, are configured correctly. You could also reset the BIOS to its default settings and then re-enable the autoboot feature if needed.
* ***Battery Calibration***: Run a battery calibration process. This can help the system correctly recognize the battery after any internal changes.
* ***Firmware Update***: Ensure that your laptop's BIOS/firmware is up to date, as updates often contain fixes for power management issues.
* ***Check Battery Connections***: Double-check all battery and ZIF connections to ensure they are secure. Loose or slightly misaligned connections could result in issues like this.