Customers are responsible for replacing which types of parts?

The correct answer highlights that customers are responsible for replacing Self-Service Customer Replaceable Units (CRUs). This classification includes parts that are designed for easy replacement by the customers themselves, meaning that the customers can perform these replacements without requiring assistance from a technician.

Self-Service CRUs are intended to simplify the process for customers, allowing them to maintain their devices more independently. This includes components that are commonly replaced, such as memory modules or hard drives, which contribute to a more user-friendly experience with the product.

In contrast, OEM parts and service parts under a warranty plan typically require professional handling or servicing, while external peripherals are not integral to the machine's core components and generally fall outside the scope of warranty service tasks as they are categorized differently. Understanding the distinction among these parts is critical for customers to know what is expected of them in terms of maintenance and replacement responsibilities.