A comprehensive reference providing all of the necessary information to explain PC and printer troubleshooting and repair through discussion of important concepts, real-world examples and hands-on exercises. This book covers both old and new technology including the newest microprocessors, GAP, 3D video and sound cards, USB and FireWire and the Internet Browser. It also covers all of the topics and provides 650 review questions for the A+ Technician Certification Exam. Basic electronics, disassembling and assembling the PC, microprocessors, RAM, motherboard support chips, expansion slots and cards, case and power supply, hard drives, floppy drives, compact disk drives, disk structure, tape drives and data protection, video systems, input devices, sound cards, serial ports and modems, parallel ports and printers, DOS, Windows 3.XX, 95/98 and NT and networks. It also includes appendices for error codes and a glossary. For anyone interested in becoming a PC technician, currently repairing PC's or taking the A+ technician exam.