No need to guess, Michael; one thing I have to give HP kudos for is that they provide actual service and repair manuals for their laptops! Here's the one you need for yours:
[link|https://h10032.www1.hp.com/ctg/Manual/c04653881.pdf|HP Notebook PC (AMD) HP 255 G4 Notebook PC Maintenance and Service Guide|new_window=true]
This should have almost all of the repair instructions you need to fix your laptop. If you're doing something that isn't covered, come on back and let us know and we'll help you figure it out.
Good luck; let us know how it goes!