"PC Hardware Maintenance, Repair and Upgrading for A+ Certification" is written as a direct response to the phenomenal growth of the computer repair market. This new text is perfectly suited for electronics technology students and others seeking to study PC Repair and earn their A+ certification. Chapters guide readers in probing the specifics underlying the operation of power supplies, motherboards and expansion cards, I/O ports, storage devices, and other system resources. Comprehensive coverage of all aspects of PC hardware maintenance also includes discussion of primary and secondary storage devices, inkjet and laser printer operations, modems, mobile computing, networking essentials and more! In addition, this book features an entire chapter that underscores the importance of preventive maintenance and details techniques for eliciting problem symptoms from customers.