Troubleshooting with LEDs
2-5
Figure 2-2 Troubleshooting: Start with the Operator Control Panel
(Continued)
Check the power supplies to see if DC power is
leaving the supply. If so, check the power and
signal lines to the CCL panel. Check the cabling between
the CCL and the operator control panel. If connections
seem OK, replace CCL. If still no lights on control
panel, replace control panel. Proceed with
Any LEDs lit
on control panel
Status LEDs are not receiving power/signals.
No
Yes
Green LED(s)
lit
System self-test passed (On is lit);
Yes
operating system running (Run is lit).
If both green LEDs are lit, system self-test has
passed, and the operating system is running. Check
the error log (see Chapter 4). Ensure that the
proper boot disk is selected to boot the operating system.
If Run is not lit, boot the operating system.
When the operating system boots, look at the error log.
SM22B-99
A
4
5
2
