The hinges on my laptop moniter are creaky and stiff...

[Fifty]

...can I spray them with WD-40?

 

[Zelig]

Probably, I spray everything with wd-40. Even computer fans, when they get noisy, I'll spray wd-40 into the middle part.

 

[Genocidicbunny]

As long as it isnt conductive, then it shouldnt matter. Make sure it isnt first, otherwise you risk frying your screen and most likely the entire laptop as well.

 

[Rheinmetall]

I don't recommend using WD-40 on plastic parts. Silicone oil is better suited for that.