How do I open my computer case?

[Joel111]

Before working inside a computer, disconnect all the cables from the back of the computer and make sure you're aware of the potential dangers of ElectroStatic Discharge (ESD).

Unfortunately, there is no standard for how to open a computer case, which means how you open your case depends on the manufacturer of your case and/or computer. Below are the three most common methods of how to open a computer case.

Before opening the case, disconnect all the cables from the back of the computer and place it on a table. Next, identify the type of chassis you're working with. Below is a short list of different types of ways a computer case cover is held on.

Screw - Case held on with screws.
Thumbscrew - Case with screws that require no special tools and can be tightened and loosened with your fingers. Often, these screws also have indents that allow them to also work with tools if needed.
Screwless - Case that has no type of screws, only held on with metal or plastic clamps that can release from the case by pressing buttons or switches.