5-1
CHAPTER
5
Introduction to Advanced
Troubleshooting
This chapter discusses advanced troubleshooting using the following software tools:
■ “NVRAM” on page 5-1
■ “Obtaining the ok Prompt for Testing” on page 5-2
■ “Diagnostic Tests Summary” on page 5-3
■ “Power-On Self-Test” on page 5-4
■ “OpenBoot PROM” on page 5-5
■ “SunVTS Software” on page 5-6
■ “Sun Install Check” on page 5-7
5.1 NVRAM
Chapter 6 contains information on how to use the NVRAM to help troubleshoot the
Sun Blade 1500 workstation.
On the Sun Blade 1500 motherboard is a nonvolatile random access memory
(NVRAM). The NVRAM stores parameters that are used for configuring system
startup. Different from previous NVRAM, the module in the Sun Blade 1500
workstation uses SEEPROM technology. Also, the real-time clock is now located in
the I/O subsystem chip and is powered by a replaceable lithium battery on the
motherboard. The interaction the user has with the SEEPROM is no different than
with an NVRAM and as such, it is still called an NVRAM.
The NVRAM configuration parameters are set at either the ok prompt or by using
the ee
prom command from the operating system.
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