Page 5 - Contents; iii
Contents Chapter 1. About this manual . . . . . . 1 Important Safety Information . . . . . . . . . . 1 Chapter 2. Safety information . . . . . . 3 General safety . . . . . . . . . . . . . . . . 3 Electrical safety . . . . . . . . . . . . . . . 3 Safety inspection guide . . . . . . . . . . . . 5 Hand...
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iv IdeaCentre Horizon 2 27 All-In-One PC Hardware Maintenance Manual
Page 7 - Chapter 1. About this manual; Important Safety Information
Chapter 1. About this manual This manual contains service and reference information for IdeaCentre Horizon 2 27 All-In-One computerslisted on the cover. It is intended only for trained servicers who are familiar with Lenovo computer products. Before servicing a Lenovo product, be sure to read the Sa...
Page 9 - Chapter 2. Safety information; General safety
Chapter 2. Safety information This chapter contains the safety information that you need to be familiar with before servicing a computer. General safety Follow these rules to ensure general safety: • Keep the areas around the computer clear and clean during and after maintenance. • When lifting any ...
Page 12 - Grounding requirements; DANGER
• Keep the parts in protective packages until they are inserted into the product. • Avoid contact with other people while handling the part. • Wear a grounded wrist strap against your skin to eliminate static on your body. • Prevent the part from touching your clothing. Most clothing is insulative a...
Page 13 - • Throw into or immerse in water
To Connect To Disconnect 1. Turn everything OFF. 2. First, attach all cables to devices. 3. Attach signal cables to connectors. 4. Attach power cords to outlet. 5. Turn device ON. 1. Turn everything OFF. 2. First, remove power cords from outlets. 3. Remove signal cables from connectors. 4. Remove al...
Page 15 - Chapter 3. General information; Specifications
Chapter 3. General information This chapter provides general information that applies to all computer models covered by this manual. Specifications This section lists the physical specifications for your computer. This section lists the physical specifications for your computer. Type IdeaCentre Hori...
Page 17 - Chapter 4. General Checkout
Chapter 4. General Checkout Attention: The drives in the computer you are servicing might have been rearranged or the drive startup sequence may have been changed. Be extremely careful during write operations such as copying, saving, orformatting. Data or programs can be overwritten if you select an...
Page 19 - Chapter 5. Using the Setup Utility; Password considerations
Chapter 5. Using the Setup Utility The Setup Utility program is used to view and change the configuration settings of your computer, regardlessof which operating system you are using. However, the operating system settings might override any similarsettings in the Setup Utility program. Starting the...
Page 21 - Enabling or disabling a device
Power-On Password When a Power-On Password is set, you cannot start the Lenovo BIOS Setup Utility program until a validpassword is typed from the keyboard. Setting, changing, or deleting a Power-On Password Note: A password can be any combination of letters and numbers up to 16 characters (a-z and 0...
Page 22 - Selecting a startup device
SATA Mode Select Disabled/IDE/AHCI mode. Device driver support is required for AHCI or RAID . Depending on how the hard disk drive image was installed, changing this setting mayprevent the system from booting. Onboard Audio Controller Select whether to enable or disable the Onboard Audio Controller ...
Page 23 - Exiting the Lenovo BIOS Setup Utility program
1. Start the Lenovo BIOS Setup Utility program (see “Starting the Lenovo BIOS Setup Utility program” on page 13). 2. From the Lenovo BIOS Setup Utility program main menu, select the Startup option. 3. Press the Enter key, and select the devices for the Primary Boot Sequence . Read the information di...
Page 25 - Hard disk drive boot error; Power Supply Problems
Chapter 6. Symptom-to-FRU Index The Symptom-to-FRU index lists error symptoms and possible causes. The most likely cause is listed first.Always begin with Chapter 4, “General Checkout,” on page 11. This index can also be used to help youdecide which FRUs to have available when servicing a computer. ...
Page 26 - POST error codes; Undetermined problems
POST error codes Each time you turn the computer on, it performs a series of tests to check that the system is operatingcorrectly and that certain options are set. This series of tests is called the Power-On Self-Test , or POST . POST does the following: • Checks some basic motherboard operations • ...
Page 27 - Chapter 7. Replacing hardware; General information; Pre-disassembly instructions
Chapter 7. Replacing hardware Attention: Do not remove the computer cover or attempt any repair before reading the “Important safety information” in the Safety and Warranty Guide that was included with your computer. To obtain copies of the Safety and WarrantyGuide, go to the Support Web site at: ht...
Page 28 - Replacing the keyboard and mouse; To replace the keyboard and mouse:; Removing the rear cover; To remove the base cover:
Replacing the keyboard and mouse To replace the keyboard and mouse: Step 1. Remove any media (disks, CDs, DVDs or memory cards) from the drives, shut down the operatingsystem, and turn off the computer and all attached devices. Step 2. Unplug all power cords from electrical outlets. Step 3. Disconne...
Page 30 - Replacing the battery; To replace the battery:
Step 6. Disconnect the two scalar cables from the connectors on the motherboard as shown. 1 2 Step 7. Put the front panel and rear cover aside. Step 8. To reattach the rear cover: a. Line up the front panel with the rear cover, and then reconnect the two scalar cables to themotherboard. b. Press dow...
Page 31 - Replacing a memory module; To replace a memory module:
Step 5. Disconnect the power cable from the connector on the motherboard. 1 Step 6. Remove the six screws that secure the battery to the rear cover 2 , then lift up the battery pack as shown. Step 7. To install a new battery: a. Line up the holes with mounting holes on the rear cover, then place it ...
Page 32 - Replacing the Wi-Fi card
Step 6. Push out the latches on both sides of the memory socket to release the memory module. Gentlypull the memory module upward to remove it from its socket. Step 7. To install the new memory module: a. Align the new memory module with the memory socket, then insert it and push down onthe top edge...
Page 33 - Replacing the hard disk drive; To replace the hard disk drive:
Step 7. Remove the screw that secures the Wi-Fi card to the motherboard. 1 Step 8. Disconnect the antenna cable and data cable from the Wi-Fi card. 2 Step 9. Pull the Wi-Fi card upward to remove it from the card port. 3 Step 10. To install the new Wi-Fi card: a. Line up the new Wi-Fi card with the c...
Page 35 - Replacing the fan module; To replace the fan module:; Replacing the heat-sink modules
Step 11. Reattach the rear cover. Replacing the fan module Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the base cover. To replace the fan module: Step 1. Remove any media (disks, CDs, DVDs or memory cards) from the drives, shut down the operatingsystem, an...
Page 36 - Replacing the speaker system; To replace the speaker system:
Step 1. Remove any media (disks, CDs, DVDs or memory cards) from the drives, shut down the operatingsystem, and turn off the computer and all attached devices. Step 2. Unplug all power cords from electrical outlets. Step 3. Disconnect all cables attached to the computer. This includes power cords, i...
Page 37 - Replacing the I/O board
Step 3. Disconnect all cables attached to the computer. This includes power cords, input/output (I/O)cables, and any other cables that are connected to the computer. Refer to “Left and right view”and “Rear view” for help with locating the various connectors. Step 4. Remove the rear cover. Refer to “...
Page 38 - Replacing the power switch board; To replace the power switch board:
Step 6. Disconnect the power connector cable from the connector on the motherboard. 1 Step 7. Remove the two screws that secure the I/O board to the rear cover. 2 Step 8. Slide out the I/O board as shown and disconnect the data cable from the I/O board. 3 Step 9. To install the new I/O board: a. Con...
Page 39 - Replacing the motherboard; To replace the motherboard:
Step 7. Remove the two screws that secure the power switch board to the rear cover 1 , lift up the power switch board 2 and disconnect the cable from the switch board. 3 Step 8. To install the power switch board: a. Connect the power cable to the new power switch board. b. Secure the power switch bo...
Page 40 - Replacing the camera; To replace the camera:
Step 9. Remove the six screws that secure the motherboard to the rear cover and lift up the motherboardto remove it. Step 10. To install the new motherboard: a. Insert the notched end of the Wi-Fi card into the card port on the new motherboard andsecure it with the screw. b. Connect the antenna cabl...
Page 41 - Replacing the LED panel module
Step 5. Remove the two screws that secure the camera and bracket to the front bezel. Lift up the cameraand bracket to remove it. Step 6. Remove the camera from bracket by removing the two screws and disconnect the data cablefrom the camera. Step 7. To install the new camera: a. Connect the data cabl...
Page 42 - To replace the LED panel module:
Note: It may be helpful to place the computer face-down on a soft flat surface for this procedure. Lenovo recommends that you use a blanket, towel, or other soft cloth to protect the computer screen from scratchesor other damage. To replace the LED panel module: Step 1. Remove any media (disks, CDs,...
Page 49 - Chapter 9. General information; Additional Service Information; Power management
Chapter 9. General information This chapter provides general information that applies to all computer models covered by this manual. Additional Service Information This chapter provides additional information that the service representative might find helpful. Power management Power management reduc...
