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...
Page 6 - iv
Page 7 - Chapter 1. About this manual; Important Safety Information
Chapter 1. About this manual This manual contains service and reference information for IdeaCentre A720 computers listed 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 Safety Information. T...
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 A720...
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
To set a Power-On Password, do the following: 1. Start the Lenovo BIOS Setup Utility program (See ”Starting the Lenovo BIOS Setup Utility program” on page 13.) 2. From the Security menu, select Set Power-On Password and press the Enter key. 3. The password dialog box will be displayed. Type the pass...
Page 22 - Selecting a startup device
Select ATA Device Setup , press the Enter key, then select SATA Mode . Select Audio Setup , press the Enter key, then select Onboard Audio Controller . Select Network Setup , press the Enter key, then select Onboard Ethernet Support or LAN Boot Agent . 4. Select Disabled or Enabled and press the Ent...
Page 23 - Exiting the Lenovo BIOS Setup Utility program
a. If you do not want to save the settings, select Discard changes and Exit from the menu. b. If you have changed these settings and want to return to the default settings, select Load Optimal Defaults from the menu. Exiting the Lenovo BIOS Setup Utility program After you finish viewing or changing ...
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. Locating connectors, controls and components; Font view
Chapter 7. Locating connectors, controls and components This section provides illustrations to help locate the various connectors, controls and components of thecomputer. Font view The following illustration shows the location of controls and components on the front of the computer. Attention: Be ca...
Page 28 - Left and right view
Left and right view The following illustration shows the location of connectors, controls and components on the left and rightside of the computer. 2 3 4 6 8 5 9 1 0 7 1 1. Air vents 6. Optical drive 2. USB 3.0 connector 7. B-CAS card slot (Japan models only) 3. HDMI-in connector (selected models on...
Page 29 - Rear view
Rear view The following illustration shows the location of connectors and components on the rear of the computer. 1 2 3 8 7 6 4 5 1. TV tuner connector (selected models only) 5. USB 2.0 connectors (2) 2. Headphone connector 6. Power connector 3. Microphone connector 7. Ethernet connector (RJ45) 4. U...
Page 30 - Hardware components
Hardware components The following illustration shows the components that make up your computer. 4 5 6 7 9 1 0 1 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 2 0 2 1 8 2 3 2 4 2 5 2 6 2 7 2 8 2 9 3 0 3 1 2 2 1. System fan 17. Bluetooth module 2. Scalar board 18. Power switch board 3. Hard disk drive bracket 19....
Page 31 - Identifying parts on the motherboard
Identifying parts on the motherboard The motherboard (sometimes called the planar or system board) is the main circuit board in your computer.It provides basic computing functions and supports a variety of devices that are factory-installed or thatyou can install later. The following illustration sh...
Page 33 - Identifying parts on the back of the LED panel
Identifying parts on the back of the LED panel The following illustration shows the components and controls on the back of LED panel. 1 2 3 4 5 6 7 8 1. Bluetooth module 5. Front function board 2. WLAN card 6. Converter board 3. Camera 7. Scalar board 4. Touch control board 8. Power switch board Cha...
Page 35 - Chapter 8. Replacing hardware; General information; Pre-disassembly instructions
Chapter 8. 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 36 - Replacing the keyboard and mouse; To replace the keyboard and mouse; Replacing the power cord or power adapter; To replace the power cord and power adapter:
Replacing the keyboard and mouse Attention: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover. 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 comp...
Page 37 - Removing the base cover; To remove the base cover
Step 2. Locate the connector for the power cord. Refer to “Rear view”. Step 3. Disconnect the failing power cord and adapter from the computer and connect the new power cordand adapter to the same connector. Removing the base cover Note: Turn off the computer and wait 3 to 5 minutes to let it cool d...
Page 38 - Replacing the hard disk drive; To replace the hard disk drive
Step 5. Return the computer to an upright position, then lift the base cover up and slide it out as shown. Step 6. To reattach the base cover: a. Line up the base cover with the base, slide it back and snap it into position. b. Place the computer face-down on a soft flat surface, then secure the bas...
Page 40 - Replacing a memory module; To replace a memory module; Replacing the system fan; To replace the system fan
c. Secure the new hard disk drive to motherboard with the 2 screws. d. Connect the data and power cable to the new hard disk drive and motherboard. Step 10. Reattach the base cover and secure it with the screws. Replacing a memory module Attention: Turn off the computer and wait 3 to 5 minutes to le...
Page 41 - Replacing the heat-sink
Step 5. Remove the 3 screws that secure the system fan to the heat-sink. 1 Step 6. Disconnect the power cable from the motherboard. 2 Step 7. Lift the system fan up to remove it. 3 1 2 3 Step 8. Line up the new system fan, then secure it to the heat-sink and connect the new power cableto the motherb...
Page 42 - Replacing the CPU; To replace the CPU
Step 7. Remove the heat-sink by lifting it up. Attention: Place the heat-sink upside down on a flat surface to prevent thermal grease from contaminating other components. Attention: Use an alcohol pad to wipe the thermal grease off the heat-sink and CPU. Step 8. Use a thermal grease syringe to place...
Page 44 - Replacing the optical drive; To replace the optical drive
Step 11. Lower the microprocessor straight down into its socket on the motherboard. Step 12. To secure the microprocessor in the socket, close the microprocessor retainer and lock it into position with the small handle. Step 13. Use a thermal grease syringe to place 5 drops of grease on the top of t...
Page 46 - Replacing the solid state disk; To replace the solid state disk; Replacing the optical drive eject board; To replace the optical drive eject board
Replacing the solid state disk Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover. To replace the solid state disk Step 1. Remove any media (disks, CDs, DVDs, or memory cards) from the drives, shut down the operatingsystem, and turn off the computer and...
Page 47 - Replacing the motherboard; To replace the motherboard:
Step 6. Lift up the optical drive eject board to remove it. Step 7. To install the new optical drive eject board: a. Connect the new optical drive eject board to the motherboard. b. Secure the new optical drive eject board to the motherboard with the 2 screws. Step 8. Reattach the base cover and sec...
Page 49 - Replacing the speaker system; To replace the speaker system:
Step 18. Use a flat head screwdriver as a lever to prise out the battery as shown. Step 19. To install the new motherboard: a. Insert the battery (CR2032) into the socket with the side labeled “+” facing up, and pressthe battery into place. b. Insert the notched end of the TV-Tuner card into the car...
Page 51 - Replacing the TV tuner card; To replace the TV tuner card
Replacing the TV tuner card Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover. To replace the TV tuner card 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 a...
Page 52 - Replacing the battery; To replace the battery
Step 13. Pull the TV-Tuner card upward to remove it from the card port on the motherboard. Step 14. To install the new TV-Tuner card: a. Insert the notched end of the TV-Tuner card into the card port on the motherboard. b. Secure new the TV-Tuner card to the motherboard with the 2 screws. c. Connect...
Page 53 - Removing the hinge from the chassis; To remove the hinge from the chassis
Step 10. Remove the 8 screws that secure the motherboard to the chassis and slide it out as shown. Step 11. Use a flat head screwdriver as a lever to prise out the battery as shown. Step 12. To install the new battery: a. Insert the new battery (CR2032) into the socket with the side labeled “+” faci...
Page 55 - Removing the rear cover; To remove the rear cover
Step 8. Reattach the base cover and secure it with the screws. Removing the rear cover Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover. To remove the rear cover Step 1. Remove any media (disks, CDs, DVDs, or memory cards) from the drives, shut down t...
Page 56 - Replacing the scalar board; To replace the scalar board
Step 7. Put the head of a flat head screwdriver between the middle frame and the rear cover as shown.Then using the screwdriver as a lever and the middle frame metal bar as the fulcrum, prise the rearcover away from the middle frame. 1 F u lc ru m Le ve r 1 Step 8. Working around the edge in an anti...
Page 58 - Replacing the touch control board; To replace the touch control board:
a. Line up the holes on the new scalar board with the mounting holes on the middle frame andsecure it with the 5 screws. b. Connect all the cables to the new scalar board. c. Reattach the scalar shielding to the middle frame with the 3 screws. Step 12. Reattach the rear cover to the LED panel. Step ...
Page 59 - Replacing the converter board; To replace the converter board:
a. Line up the holes on the new touch control board with the mounting holes on the middle frameand secure it with the 2 screws. b. Connect all the cables to the new touch control board. Step 11. Reattach the rear cover to the LED panel. Step 12. Reattach the hinge to the chassis, and reconnect the t...
Page 60 - Replacing the power switch board; To replace the power switch board
Step 10. To install the new converter board: a. Line up the holes on the new converter board with the mounting holes on the middle frameand secure it with the 4 screws. b. Connect the 2 cables to the new converter board. Step 11. Reattach the rear cover to the LED panel. Step 12. Reattach the hinge ...
Page 61 - Replacing the Bluetooth module; To replace the Bluetooth module:
Step 8. Remove the screw that secures the power switch board to the LED panel and lift up the powerswitch board to remove it. Step 9. To install the power switch board: a. Line up the hole on the new power switch board with the mounting hole on the LED panel andsecure it with the screw. b. Connect t...
Page 62 - Replacing the WLAN card; To replace the WLAN card:
Step 6. Remove the rear cover. Refer to “Removing the rear cover”. Step 7. Use a small flat head screwdriver to prise the Bluetooth module away from the socket. 1 2 Step 8. Disconnect the cable from the Bluetooth module. 3 1 2 3 Step 9. To install the new Bluetooth module: a. Connect the cable to th...
Page 63 - Replacing the camera; To replace the camera:
Step 9. Lift up the WLAN card to remove it from the socket. 1 1 1 1 2 4 3 Step 10. To install the new WLAN card: a. Connect the data cable to the new WLAN card. b. Line up the new WLAN card with the socket, snap it into position and secure it with the pins. c. Connect the antenna cable to the new WL...
Page 64 - Replacing the front function board; To replace the front function board:
Step 8. Lift up the camera 2 and disconnect the data cable from the camera. 3 1 2 3 1 Step 9. To install the new camera: a. Connect the data cable to the new camera. b. Line up the holes in the new camera with the mounting holes on the front bezel and secureit with the 2 screws. Step 10. Reattach th...
Page 65 - Replacing the LED panel; To replace the LED panel:
Step 9. Lift up the front function board to remove it from the front bezel. 3 3 1 2 1 Step 10. To install the new front function board: a. Connect the data cable to the new front function board. b. Line up the holes in the new front function board with the mounting holes on the front bezeland secure...
Page 67 - FRU lists
Step 17. Remove the 6 screws that secure the hinge to the middle frame and set the hinge aside. Step 18. To install the new the LED panel: a. Line up the holes on the hinge with the mounting holes on the new middle frame and secure itwith 6 screws. b. Attach all the cables to the new LED panel middl...
Page 75 - 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...
