Tools
Diagnosing LED patterns
Many hardware components of the computer have LEDs that can be used to diagnose problems. This section describes the following patterns:
●Front panel LEDs on page 177
●PCI slot LEDs on page 179
●Power supply LEDs on page 181
●Disk drive LEDs on page 182
●Tape drive LEDs on page 184
Front panel LEDs
The system status and control panel, shown in the following figure, includes several LED status indicators, a power button, and a security key switch.
Issue 2.0 June 2004 177
