If anyone can help me to get where can I download computer Motherboard/Laptops schematic diagrams is appreciated.

I prefer Motherboards diagrams the most than Laptops.

 

Hello there, welcome to AAC!
I hope this helps.
https://www.laboneinside.com/laptop-schematic-diagram/
https://www.laptopschematic.com/
https://www.schematic-x.com/?m=1
https://www.schematicsunlimited.com/
https://www.soft4led.com/2020/03/hp-laptop-schematic-diagram-pdf-and-boardview.html
https://www.motherboardusermanuals.com/