Sun Microsystems Ultra 5, Service Manual

Page: 84 / 258

4-12 Sun Ultra 5 Service Manual • February 2000
4.7 OpenBoot Diagnostics
The OpenBoot diagnostic (OBDiag) is a menu-driven diagnostic tool that verifies:
■
Internal I/O system
■
Ethernet
■
Keyboard
■
Mouse
■
Diskette drive (floppy)
■
Parallel port
■
Serial ports
■
NVRAM
■
Audio
■
EIDE
■
Video
OBDiag performs root-cause failure analysis on the referenced devices by testing
internal registers, confirming subsystem integrity, and verifying device functionality.
Note –
The OBDiag test result data captured in the following code examples
represent the test result data that is output when the system being tested is
connected to a remote shell window through a
tip
connection. When the system
being tested is tested in a stand-alone configuration, the test result data may differ.
4.7.1 Starting the OBDiag Menu
1. At the
ok
prompt, type:
2. At the
ok
prompt, type:
ok% setenv mfg-mode on
mfg-mode = on
ok% setenv diag-switch? true
diag-switch? = true