Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to remove an atx motherboard [title] Begin by shutting down your computer and removing all cables from the case. [title] Make sure you are in a static-free environment, with rubber-soled shoes on. [step] It is good practice to have an anti-static wrist-wrap attached and clipped on to something metal.

Ending1: It is also frequently suggested to touch things metal, other than your computer, while working with sensitive computer parts. [title] Remove all screws holding the outer shell of your desktop or tower and slide off the metal casing. Ending2: Don't wear rubber gloves, and wear a long sleeved shirt for protection. [title] Ensure that any accessories, such as the power panel, circuit board and keyboard are secure. Ending3: [title] First, run any system hardware check (detailed in the manual). [step] The prompt for systems check will be on the left side of the file, near the front of the computer, and if they aren't, it says' notify'. Ending4: You will also want to leave a tool or something similar covering it so that you don't damage your coating while you are working on the computer. That way you can look over it later but do not wear it when working on your computer.

Answer format: ending1/ending2/ending3/ending4