Laptop User Manual

2-2 User’s Manual
L450/L450D
Left side
The following figure shows the computer’s left side.
Figure 2-2 The left side of the computer
Microphone jack A 3.5 mm mini microphone jack enables
connection of a three-conductor mini jack for
monaural microphone input, and connection of a
stereo device for audio input.
Headphone jack This jack lets you connect a stereo headphone
(16 ohm minimum). When you connect
headphones, the internal speaker is
automatically disabled.
Volume control Use this dial to adjust the volume of the internal
stereo speakers and optional external stereo
headphones (if connected).
Move the Volume control to the left to decrease
the volume and to the right to increase the
volume.
1 2 3 4 5
1. Cooling vents
2. External monitor port
3. LAN jack
4. HDMI out port
5. Universal Serial Bus (USB 2.0) port
Cooling vents The cooling vents help keep the processor from
overheating.
Do not block the cooling vents. Keep foreign metal objects, such as
screws, staples and paper clips, out of the cooling vents. Foreign metal
objects can create a short circuit, which can cause damage and fire,
possibly resulting in serious injury.