Hi @deadmau5 ,
Have you checked that the CMOS battery is OK and not depleted?
Try doing a power reset after you remove the CMOS battery, i.e. remove main battery, remove CMOS battery, press Power button for 10+ seconds and release, insert CMOS battery, insert main battery.
Then start the laptop and if it starts check if you can get into BIOS at least.
Here's a [https://www.youtube.com/watch?v=Mws9nro0rAo|video] that hopefully may be of some help (not sure if it is exactly for your model)