There is a huge percentage of Computer Technicians out there know how to fix both laptops and desktops. However, the problem with repairing laptops is getting them apart. There are often screws hidden under stickers, special clips that need to be squeezed in a certain way and usually the laptop needs to be disassembled in a certain order.

Of course, it helps if you have a Service Guide to show you how to get the laptop apart; but they are sometimes difficult to get. For example, Apple only allows their service manuals to be viewed by AASP certified businesses/technicians and other brands guard their service manuals fairly closely as well.
Because of this, I have created this small list of sites where you can obtain Laptop teardown guides.

Official Sources
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.

Dell Laptops

HP & Compaq Laptops

Toshiba Thinkpad Laptops

Other Sources

Tims Laptop Service Manuals – Large list of laptop repair manuals. Scroll about 1/4 down the page to see the manuals.
Large list of laptop repair manuals

Inside My Laptop – Guide on how to replace various laptop parts.

EServiceInfo – A large (somewhat unorganised) archive of service manuals.

IFixIt – IFixIt has teardown guides for Apple computers, PCs and many other consumer electronics.

Of course, if you want to know how to repair laptops (brand unspecific) then I highly recommend Podnutz’s Laptop Repair Videos.

It is difficult to get service guides for many brands so if you know of any other resources, please post them in the comments below.