Troubleshooting
174 Avaya CMS Sun Ultra 5 Computer Hardware Installation, Maintenance, and Troubleshooting
Diagnosing LED patterns
Many hardware components of the computer have LEDs that can be used to diagnose
problems. This section describes those LED patterns.

Keyboard LED patterns

During POST, LEDs on the keyboard light in patterns that show the progress of the tests
and if any failures have been detected. The following table describes these patterns.

Tape drive LED status patterns

This section describes the LED status patterns for the following tape drives:
●DDS4, 4-millimeter, 20/40-GB
●SLR5, QIC, 4/8-GB
●XL/XS/DX, 8-millimeter, 7/14-GB
DDS4 tape drive – The tape drive LEDs show the following status:
●Tape LED (green) — The LED flashes to show activity (loading, unloading, reading , and
writing). The LED is steady when a cartridge is loaded and the tape drive is ready to
begin operation.
●Clean LED (amber) — The LED flashes to indicate that a cartridge is near the end of its
life, or that the heads need cleaning.
Caps
lock Compose Scroll
lock Num
lock Meaning
Blink Off Off Off POST in progress
Off Off Off Off POST successfully
completed
On Off Off On System board failed
On Off On Off No memory found
On On On Off Faulty CPU