Lenovo THINKPAD E40 Hardware Maintenance Manual page 78

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ThinkPad Edge 14", Edge 15", E40, and E50 Hardware Maintenance Manual
Table 6. Status indicators (continued)
Indicator Meaning
On-screen indicators Caps lock:
Wireless status:
Caps Lock mode is enabled. You can enter all alphabetic
characters (A-Z) in uppercase without pressing the Shift
key.
Press F9 to enable or disable the wireless features. You
can quickly change the power state of each feature in the
list.