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7. Remove the power cord connector from the rear I/O assembly.
Figure 23. Removing the power cord connector from the rear I/O assembly
8. To reinstall the rear I/O assembly, install the two screws to secure the power cord connector. Position the new rear I/O assembly into place, and then align the screw holes with the corresponding holes in the computer main bracket, and then install the other three screws to secure the rear I/O assembly.
10. Go to “Completing the parts replacement” on page 108.
Removing the VESA mount bracket
Attention: Do not open your computer or attempt any repair before reading and understanding the
“Important safety information” on page 1
This section provides instructions on how to remove the VESA mount bracket.
To remove the VESA mount bracket, do the following:
1. Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect all power cords from electrical outlets and disconnect all cables that are connected to the computer.
2. Place a soft, clean towel or cloth on the desk or other flat surface. Hold the sides of your computer and gently lay it down so that the screen is against the surface and the cover is facing up.
3. Remove the computer cover. See “Removing the computer cover” on page 75.
4. Locate the VESA mount bracket. See “Locating major FRUs and CRUs” on page 66.
6. Remove the rear I/O assembly. See “Replacing the rear I/O assembly” on page 84.
86 ThinkCentre E73z Hardware Maintenance Manual
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Key Features
- All-in-One PC Black 150 W
- Intel® Core™ i3 i3-4160 3.6 GHz
- 50.8 cm (20") HD+ 1600 x 900
- 4 GB DDR3-SDRAM 1600 MHz 1 x 4 GB
- 500 GB HDD DVD±RW Card reader integrated
- Intel® HD Graphics 4400
- 1 MP 1280 x 720 pixels
- Ethernet LAN 10,100,1000 Mbit/s Bluetooth 4.0
- FreeDOS
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Table of contents
- 5 Important safety information
- 7 General safety
- 7 Electrical safety
- 9 Safety inspection guide
- 9 Handling electrostatic discharge-sensitive devices
- 10 Grounding requirements
- 10 Safety notices (multi-lingual translations)
- 33 Specifications
- 33 Lenovo programs
- 34 Accessing Lenovo programs on the Windows 7 operating system
- 35 Accessing Lenovo programs on the Windows 8 or Windows 8.1 operating system
- 35 Lenovo Support Web site
- 37 Problem determination tips
- 39 Basic troubleshooting
- 40 Accessing Control Panel on the Windows 8 or Windows 8.1 operating system
- 40 Troubleshooting procedure
- 41 Troubleshooting
- 41 Audio problems
- 43 CD problems
- 44 DVD problems
- 45 Intermittent problems
- 45 Hard disk drive problems
- 46 Keyboard, mouse, or pointing device problems
- 48 Monitor problems
- 50 Networking problems
- 52 Option problems
- 53 Performance and lockup problems
- 55 Printer problems
- 55 Serial port problems
- 56 Software problems
- 57 USB problems
- 57 Diagnostics
- 58 Lenovo Solution Center
- 59 Starting the Setup Utility program
- 59 Viewing and changing settings
- 59 Using passwords
- 60 Password considerations
- 60 Power-on password
- 60 Administrator password
- 60 Setting, changing, and deleting a password
- 60 Erasing lost or forgotten passwords (clearing CMOS)
- 61 Enabling or disabling a device
- 61 Selecting a startup device
- 62 Selecting a temporary startup device
- 62 Selecting or changing the startup device sequence
- 62 Changing the BIOS settings before installing a new operating system
- 62 Exiting the Setup Utility program
- 63 Hard disk drive boot error
- 63 Power supply problems
- 63 Beep symptoms
- 64 POST error codes
- 65 Miscellaneous error conditions
- 67 Undetermined problems
- 69 Locating connectors, controls, and indicators on the front of your computer
- 70 Locating connectors on the rear of your computer
- 70 Locating major FRUs and CRUs
- 73 Looking up FRU information
- 73 Locating parts on the system board
- 75 Removing and installing the computer stand
- 75 Removing and reinstalling the frame stand
- 77 Removing and installing the monitor stand
- 79 Removing the computer cover
- 79 Removing and reinstalling the feet stand
- 80 Removing and installing the hard-disk-drive EMI shield
- 82 Replacing the 3.5-inch hard disk drive or hybrid hard disk drive
- 84 Replacing the 2.5-inch solid-state drive or hybrid hard disk drive
- 86 Replacing the optical drive
- 87 Removing and reinstalling the system board shield
- 88 Replacing the rear I/O assembly
- 90 Removing the VESA mount bracket
- 91 Replacing the power supply
- 92 Replacing the microprocessor fan
- 94 Replacing the heat sink assembly
- 95 Replacing the microprocessor
- 98 Replacing the card reader
- 99 Replacing the battery
- 100 Replacing the converter board
- 101 Installing or replacing a memory module
- 103 Replacing the internal speakers
- 104 Replacing the integrated camera
- 105 Replacing the system board
- 107 Replacing the LCD panel
- 111 Replacing the Wi-Fi card
- 112 Completing the parts replacement
- 115 Security features
- 115 Hardware controlled passwords
- 115 Operating system password
- 115 Vital product data
- 115 BIOS levels
- 115 Flash update procedures
- 116 Updating (flashing) the BIOS from a disc
- 117 Updating (flashing) the BIOS from your operating system
- 117 Recovering from a POST/BIOS update failure
- 118 Power management
- 118 Automatic configuration and power interface (ACPI) BIOS
- 118 Automatic Power-on features
- 120 Television output notice
- 120 European conformance CE mark
- 120 Trademarks