Lenovo ideacentre 720 User manual

ideacentre
720
Desktop PC
User Guide
Machine Type (MT):
90HY [ideacentre 720-18APR/Energy Star]
90HT [ideacentre 720-18ICB/Energy Star]

1
Front view of the computer
ideacentre 720-18APR
ATTENTION: Be sure not to block any air vents on the computer. Blocked air vents may cause thermal
problems.
Power button
Hard disk drive indicator
Optical drive eject button
Optical Drive
Memory card reader
Microphone connector
Headphone connector
USB 3.1 Gen 2 connectors (2)
USB 3.1 Gen 1 connectors (2)

2
Front view of the computer
ideacentre 720-18ICB
ATTENTION: Be sure not to block any air vents on the computer. Blocked air vents may cause thermal
problems.
Power button
Hard disk drive indicator
Optical drive eject button
Optical Drive
Memory card reader
Microphone connector
Combo audio jack*
USB 3.0 Type-C connector
USB 3.1 Gen 1 connectors (2)
USB 3.1 Gen 2 connectors (2)
* Combo audio jack: Used to connect headsets.

3
Rear view of the computer
ideacentre 720-18APR
Audio connectors
VGA-out connector
HDMI-out connector
USB 3.1 Gen 1 connectors (2)
USB 2.0 connectors (2)
Ethernet connector
Wi-Fi antenna
(selected models only)
Expansion card slots
Power connector
NOTE: If your device is equipped with a discrete graphics card, connect the display device to the DP or
HDMI-Out port of the discrete graphics card.
ATTENTION: Do not open the Wi-Fi antenna cover.

4
Rear view of the computer
ideacentre 720-18ICB
Headphone connector
VGA-out connector
HDMI-out connector
USB 2.0 connectors (4)
Ethernet connector
Wi-Fi antenna
(selected models only)
Expansion card slots
Power connector
NOTE: If your model has two VGA monitor connectors, be sure to use the connector on the graphics
adapter.
ATTENTION: Do not open the Wi-Fi antenna cover.

5
Safety information for replacing CRUs
Do not open your computer or attempt any repairs before reading the “Important safety information” in the
Safety, Warranty, Environment, Recycling Information Guide and Important Product Information Guide that was
included with your computer.
If you no longer have this copy of the Safety, Warranty, Environment, Recycling Information Guide and Important
Product Information Guide, you can obtain one online from the website at http://www.lenovo.com/UserManuals.
Pre-disassembly instructions
Before proceeding with the disassembly procedure, make sure that you do the following:
1. Turn off the power to the system and all peripherals.
2. Unplug all power and signal cables from the computer.
3. Place the system on a at, stable surface.
CRUs for your computer include:
• keyboard • opticaldrive
• mouse • memorycardreadermodule
• computercover • PCIexpressadapter
• frontbezel • memorymodule
• harddiskdrive • M.2solid-statedrive
The parts listed below are optional CRUs for experienced users:
• battery • powersupply
Instructions for replacing these parts can be found in the Hardware Maintenance Manual from the Lenovo
Support Web Site. To obtain a copy of the Hardware Maintenance Manual, go to:
www.lenovo.com/UserManuals.
This part contains instructions for replacing the following parts:
• Harddiskdrive(Followsteps:
1
2
3
)
• Opticaldrive(Followsteps:
1
2
4
)
• PCIexpressadapter(Followsteps:
1
2
5
)
• Memorycardreadermodule(Followsteps:
1
2
6
)
• Memorymodule(Followsteps:
1
2
7
)
• M.2solid-statedrive(Followsteps:
1
2
8
)

6
1
Removing the computer cover
2
Removing the front bezel

7
3
Replacing a hard disk drive

8
5
Replacing a PCI express adapter
4
Replacing the optical drive

9
6
Replacing the memory card reader module