Lenovo IdeaCentre B750 All-in-One- Manuals

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: • Observe good housekeeping in the area of the machines during and after maintenance. • When lifting a...

• 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 and retains a charge even when you are wearing a wrist strap. • Use the black side ...

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 outlet. 3. Remove signal cables from connectors. 4. Remove all...

Chapter 3. General information This chapter provides general information that applies to all machine types supported by this publication. Specifications This section lists the physical specifications for your computer. This section lists the physical specifications for your computer. Type IdeaCentre...

Chapter 4. General Checkout Attention: The drives in the computer you are servicing might have been rearranged or the drive startup sequence changed. Be extremely careful during write operations such as copying, saving, or formatting.Data or programs can be overwritten if you select an incorrect dri...

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...

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...

USB Setup press the Enter key, and then select USB Functions . ATA Device Setup press the Enter key. Select Configure SATA as , press the Enter key and then select SATA mode. Audio Setup press the Enter key, and then select Onboard Audio Controller . Network Setup press the Enter key, then select On...

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 settings, press the Esc key to return to the Lenovo BIOS Setup Utility program main menu. Y...

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. ...

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 system-board operations •...

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...

Left and right view The following illustration shows the location of connectors, controls and components on the left and rightside of the computer. 6 7 1 2 3 4 5 1. USB 3.0 connecto 5. Memory card reader 2. Headphone connector 6. Optical drive eject button 3. Microphone connector 7. Power button 4. ...

Rear view The following illustration shows the location of connectors and components on the rear of the computer. 1 3 2 5 4 6 8 7 1. TV tuner connector (selected models only) 5. USB 3.0 connectors (2) 2. Ethernet connector 6. USB 2.0 connectors (2) 3. HDMI-in connector 7. Power connector 4. HDMI-out...

Hardware components The following illustration shows the components that make up your computer. 2 3 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 4 5 1 8 1. Rear cover 11. B-CAS card reader 2. Computer stand 12. System fan 3. Middle cover 13. Heat-sink 4. EMI cover 14. Subwoofer 5. Motherboard 1...

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...

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...

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...

Step 3. Disconnect the failing power cord and adapter from the computer. Step 4. Connect the new power cord to the same connector as shown. Removing the computer cover Attention: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover. Note: It may be helpful to p...

a. Line up the cover pieces with the chassis then slide them back. Replacing a memory module Attention: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover. Attention: It may be helpful to place the computer face-down on a soft flat surface for this procedure....

Step 8. Install the new hard disk drive as follows: a. Attach the shielding to the new hard disk drive, and secure it to the hard disk drive with thetwo screws. b. Line up the new hard disk drive with the bracket and secure it with the pins. c. Slide the hard disk drive and bracket back into positio...

Step 8. Use a small flat head screwdriver to press and push out the pins that secure the cover to thedisk. 2 3 Step 9. Separate the cover from the defective optical drive as shown. 1 2 3 Step 10. Install the new optical drive as follows: a. Align the new optical drive with the cover, and then push t...

Step 4. Remove the four screws that secure the computer stand to the chassis, then lift up the computerstand to remove it. 1 2 Step 5. To reinstall the computer stand: a. Line up the computer stand with the mounting holes in the chassis and place it back intoposition. b. Secure the stand to the chas...

Step 7. Remove the fourteen screws that secure the middle cover to the chassis. Step 8. Lift up the middle cover from the bottom to remove it. Step 9. To reattach the middle cover: a. Line up the middle cover with chassis, then place it back into position. b. Secure the middle cover to the chassis w...

Step 8. Remove the screw that secures the converter board to the chassis and then lift up the converterto remove it. 1 Step 9. Disconnect the 2 cables from the converter board. Step 10. Lift up the converter board to remove it. 2 Step 11. To install the new converter board: a. Connect the 2 cables t...

Step 8. Push the two pin to release the camera 1 , then lift the camera out. 2 Step 9. Disconnect the data cable from the camera. 3 Step 10. Push the pins to release the camera out of housing 4 , then lift the camera out. 5 Step 11. To install the new camera: a. Line up the new camera with the housi...

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, ...

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 “...

Step 9. Disconnect the subwoofer cable from the connector on motherboard. 1 Step 10. Lift up the subwoofer to remove it. 2 Step 11. To install the new subwoofer: a. Line up the new subwoofer with mounting screws on the chassis, the place the new subwooferinto position. b. Connect the new subwoofer c...

Removing the power supply Attention: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover. 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...

Step 10. Disconnect the two power cables from the motherboard. Step 11. Remove the three screws that secure the power supply to the chassis, and then lift up the power supply as shown. Step 12. To install the new power supply: a. Line up the new power supply, secure it to the chassis using the three...

Step 9. Disconnect the antenna cable(s) from the TV-Tuner card. 1 Step 10. Remove the screw that secures the TV-Tuner card to the motherboard. 2 Step 11. Pull the TV-Tuner card upward to remove it from the card port on the motherboard. 3 Step 12. To install the new TV-Tuner card: a. Insert the notch...

Step 9. Disconnect the antenna cables from the Wi-Fi card. 1 Step 10. Remove the screw that secures the Wi-Fi card to the motherboard. 2 Step 11. Lift up the Wi-Fi card upward to remove it from the socket. 3 Step 12. To install the new Wi-Fi card: a. Insert the new Wi-Fi card to the socket and secur...

Step 9. Disconnect the fan power cable from the motherboard. Step 10. Remove the three screws that secure the system fan to the heat-sink 1 and lift the system fan up to remove it. 2 Step 11. To install the new system fan: a. Place the new system fan into position, and secure it with the three screw...

Step 10. Remove the eight screws that secure the heat-sink to the motherboard, and then lift up the heat-sink to remove it. Step 11. To install the new heat-sink: a. Line up the new heat-sink with mounting holes on motherboard and secure it with the eightscrews. Step 12. Reattach the system fans, EM...

Important: To avoid damaging the microprocessor contacts, keep the microprocessor completely level while installing it into the socket. Step 15. Lower the microprocessor straight down into its socket on the motherboard. Step 16. To secure the microprocessor in the socket, close the microprocessor re...

Step 19. Reattach the EMI cover, middle cover, optical drive, computer stand and the rear cover. Replacing the LED panel module Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover. Note: It may be helpful to place the computer face-down on a soft flat su...

Chapter 9. General information This chapter provides general information that applies to all machine types supported by this publication. Additional Service Information This chapter provides additional information that the service representative might find helpful. Power management Power management ...