TX2550 M4 Upgrade and Maintenance Manual 503
3
Global Error 
indicator, 
see also 
"iRMC-
related 
status 
signals" on 
page 504
off
No critical event detected (non CSS 
component).
orange on
Prefailure event detected (non CSS 
component).
orange 
flashing
Non CSS component failure detected.
Possible causes:
– System is out of the specified 
temperature range
– Defective sensor
–CPU error
– Error detected by server 
management software
4
HDD/SSD 
activity 
indicator
green 
flashing
Data access in progress.
5
Power-on 
indicator
off The server is switched off.
green on
– The server has been switched on 
but Power Cycle Delay settings 
delay it from turning on for a 
specified time.
– The server is switched on and 
operating normally.
green 
flashing 
slowly
The BMC firmware is starting up after 
the server has been connected to the 
mains.
Pos. Label Indicator Status Description