146 Chapter 7
Troubleshooting the Processor, Power Supply, and Display
What You Will Find in This Chapter
What You Will Find in This Chapter
The following information is presented in this chapter:
1. Theory of operation of the CPU, power supply, and display sections
along with descriptions of the motherboard, front panel interface
assembly and SCSI Interface board.
2. Isolating the cause of an hardware problem by verifying the
functionality of assemblies in these sections.
NOTE Each section first describes how the assembly works, then gives
information to help you troubleshoot the assembly. Each description
explains the purpose of the assembly, describes the main components,
and lists external connections to the assembly.
This following sections are found in this chapter:
• Motherboard Description.....................................................page 147
• CPU Assembly Description .................................................page 148
• Verifying the CPU Assembly ...............................................page 149
• Power Supply Description ...................................................page 153
• Isolating a Power Supply Problem......................................page 154
• SCSI Interface Board Description.......................................page 158
• Front Frame Description .....................................................page 159
Keyboard Description .....................................................page 159
Front-Panel Interface Description .................................page 159
Display Description.........................................................page 159
Disk Drive........................................................................page 159
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