Function 04: Lamp test

This function shows whether any control panel indicators are burned out and whether characters that are displayed in the Function/Data display on the control panel are valid.

This function is available in both normal and manual operating mode.

When you activate the lamp test, all of the control panel lights and indicators are lit. The lamp test continues on the system control panel for four minutes.

Use the following procedure to verify that the lights on the system control panel are working correctly. If you cannot complete these steps, see "Starting Point for All Problems" in the Problem Analysis information for your system to start problem analysis.

Power on the system.
Press the Increment (↑) or Decrement (↓) buttons on the control panel to display function 04.
Press Enter on the control panel.

Do all of the lights and indicators on the system control panel come on?

Yes	No
↓	Exchange the control panel or the replaceable unit that contains the control panel function [system unit backplane (MB1) or tower card (CB1)]. See "Removal and Installation Procedures" in the Problem Analysis information for your system.

Do the expansion unit control panel lights all come on?
Note: The expansion unit control panel lights will be lit for only about 25 seconds after function 04 is entered.

Yes No

↓ Exchange the control panel on the expansion unit.

The lights on the system control panel are working correctly.