How do you find out the details of your laptops motherboard?

Answer 1

I assume you're asking "how do I know what kind of motherboard I have" and not the usually much easier "which part in the computer is the motherboard" (it's almost certainly the biggest circuit board in there).

The only sure one I know of is to look for the manufacturer's name and model number silkscreened onto the board somewhere.

Alternatively, if it's hooked up and working, the power-on self-test may tell you, though sometimes these are a little more vague than might be hoped (for example, while it's likely to tell you the manufacturer and possibly the model, it may or may not specify the particular revision).

Answer 2

There are not many ways to do that. One of ways is to use forum of manufacture for particular model of laptop (usually there is one). Another way is the service manual.