TX2550 M4 Upgrade and Maintenance Manual 499
18.2.1.2 Onboard indicators and controls
Figure 363: Onboard indicators and Indicate CSS button of system board D3386
I LEDs A, B and C are visible from the outside on the server rear. All other
LEDs are only visible if the top cover has been opened.
If the server has been powered off (power plugs must be disconnected) it is
possible to indicate the faulty component by pressing the indicate CSS button.
Pos. Description
1 Indicate CSS button