Led Operation - IBM 4810-E3H Installation And Service Manual

March 2009
Figure 2. Front view of 4810/4910 system unit
These are the descriptions of the indicators that are on the front cover:
This indicates a standard USB port.
This LED indicates HDD activity.
This LED indicates the 4810 power state. Hold down the power
button for 4 seconds to power off.
Table 5. LED operation
System state
Off (No AC supplied)
Off (AC supplied) (Note: this state can be
entered by holding the power button down
for at least 4 seconds)
On (POST)
On (Normal operation after post '8B'h)
S1 (Standby)
S3 (Suspend to RAM)
Product introduction
LED state or operation
OFF
Blip (0.25 second ON, 1.75 seconds OFF)
Blinking (0.5 second ON, 0.5 second OFF)
ON
Blinking (0.5 second ON, 0.5 second OFF)
Blinking (0.5 second ON, 0.5 second OFF)
Chapter 1. Introduction
5