I haven't looked at all of these yet but it looks like it might be useful.
Here is a small list of sites where you can obtain Laptop teardown guides.
These are some of the manufacturers that actually share their tear down
guides. The majority do not.
Many of these links contain other information about the laptop (drivers, specifications etc..),
so look for either the “Maintenance Guide” or “Service Guide” on these pages.
http://www.technibble.com/7-sites-with-laptop-teardown-guides-repair-resource/