Use The I/O Box (For Selected Fanless Models) - Lenovo ThinkCentre M75n User Manual

• Show only on 2: Display the video output only on an external display.
If you show programs using DirectDraw or Direct3D
video output.
Change display settings
1. Right-click a blank area on the desktop and select Display settings.
2. Select the display that you want to configure.
3. Change display settings of your preference.
You can change the settings for both the computer display and the external display. For example, you can
define which one is the main display and which one is the secondary display. You also can change the
resolution and orientation.
Note: If you set a higher resolution for the computer display than the external display, only part of the screen
can be displayed on the external display.

Use the I/O box (for selected fanless models)

If your computer has an I/O box, you can use it to supply power to your computer and expand your computer
functionality.
https://support.lenovo.com/solutions/iobox
Front
1. Serial connectors (2)
2. Ethernet connectors (2) (PoE)
Rear
The items a , b , c , d shown below come with the I/O box.
®
in full-screen mode, only the main display shows the
• Connect an external modem, a serial printer, or other devices that use a serial
connector.
• Support RS-232, RS-422, and RS-485 standards. The default standard is RS-
232. You can configure the connectors with the IoT IOBOX DT1 IO
CONTROLLER application.
• Connect to a local area network (LAN). When the green indicator is on, the
computer is connected to a LAN. When the yellow indicator blinks, data is
being transmitted.
• Support Power over Ethernet (PoE) technology. Supply power to external
device connected to this connector over an Ethernet cable, such as a VoIP
phone, an IP camera, or other devices that also support PoE technology.
Note: To use the PoE function, the dc power input needs to be higher than 135
W.
.
Chapter 2 Get started with your computer
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