Lenovo C240 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: • Keep the areas around the computer clear and clean during and after maintenance. • When lifting any ...

• 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...

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...

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 Lenovo C240/C24...

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...

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...

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...

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 ...

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 motherboard operations • ...

Chapter 7. Locating connectors, controls and components This section provides illustrations to help locate the various connectors, controls and components of thecomputer. Front view The following illustration shows the location of controls and components on the front of the computer. Attention: Be c...

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

Rear view The following illustration shows the location of connectors and components on the rear of the computer. 1 2 3 4 1. Power connector 4. Ethernet connector 2. HDMI-out connector (selected models only) 5. Air vents 3. USB 2.0 connectors (selected models only) Chapter 7 . Locating connectors, c...

Hardware components The following illustration shows the components that make up your computer. 1 2 3 4 5 6 7 8 9 1 0 1 3 1 4 1 5 1 2 1 1 1. Front bezel 9. Camera 2. Motherboard 10. Converter board bracket 3. EMI shielding 11. Converter board 4. Optical drive 12. Heat-sink module 5. Front indicator ...

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 thatcan be installed later. The following illustration s...

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 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...

a. Align the new optical drive with the cover, and then push the cover back into position. b. Slide the new optical drive into the drive bay, then push it into position. c. Secure the optical drive to the chassis using the screw. Replacing the power adapter To replace the power adapter: Step 1. Remo...

Removing the rear cover Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the rear 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 p...

Step 8. To reattach the rear cover: a. Line up the rear cover with the front bezel and reconnect the LVDS cable. b. Line up the holes on the rear cover with mounting holes on the front bezel, and place the rearcover into position. c. Secure the rear cover to the front bezel with the 5 screws. Replac...

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 5. Remove the 4 screws that secure the heat-sink module to the motherboard. Step 6. Lift up the heat-sink to remove it. Attention: Place the heat-sink upside down on a flat surface to prevent thermal grease contaminating other components. Step 7. To install the new heat-sink: a. Use an alcohol ...

Step 5. Disconnect the power cable from the connector on the motherboard. 1 Step 6. Remove the 2 screws that secure the system fan to the rear cover. Step 7. Lift up the system fan to remove it. 2 1 2 Step 8. To install the new system fan: a. Line up the new system fan with the mounting holes on the...

Step 5. Disconnect the antenna and data cables from the Wi-Fi card. 1 Step 6. Remove the screw that secures the Wi-Fi card to the motherboard. 2 Step 7. Pull the Wi-Fi card upward to remove it from the socket. 3 1 2 3 Step 8. To install the new Wi-Fi card: a. Insert the new Wi-Fi card into the card ...

Step 5. Disconnect the speaker cable from the connector on motherboard. 1 Step 6. Detach the speaker system from the rubber screws. 2 3 1 2 2 3 Step 7. To install the new speaker system: a. Secure the new speaker system to the chassis with the rubber screws. b. Connect the new speaker cable to the c...

Step 5. Disconnect the data cable from the front indicator board. 1 Step 6. Remove the 2 screws that secure the front indicator board to the rear cover. 2 Step 7. Lift up the front indicator board to remove it. 1 2 Step 8. To install the new front indicator board: a. Line up the front indicator boar...

Step 5. Disconnect the power switch board cable from the connector on the motherboard. 1 Step 6. Remove the screw that secures the power switch board to the rear cover and lift up the powerswitch board to remove it. 2 1 2 Step 7. To install the power switch board: a. Line up the holes on the new pow...

Replacing the computer stand Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the rear cover. To replace the computer stand: Step 1. Remove any media (disks, CDs, DVDs, or memory cards) from the drives, shut down the operatingsystem, and turn off the computer a...

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 5. Disconnect the 2 cables from the converter board. 1 Step 6. Remove the 2 screws that secure the converter board to the bracket. 2 Step 7. Lift up the converter board to remove it. 3 1 1 2 2 3 Step 8. To install the new converter board: a. Line up the holes in the new converter board with the...

Step 11. The LED panel is pined to the front bezel. Pull the pins outward to release it 1 , then slide out the LED panel out as shown. 2 3 1 2 3 Step 12. To install the new the LED panel: a. Line up the new LED panel with the front bezel, then slide it into position. b. Secure the LED panel to the f...

Panel Brand PJP 6 Setting PJP 7 Setting LG(18.5'' )-LM185WH2-TLK1 CMI(18.5'')-M185BGE-L23 AUO(18.5'')-M185XTN01.3 BOE(18.5'')-B3 HT185WX1-300 Step 13. Reattach the rear cover and secure it with the screws. 46 Lenovo C240/245/255 All-In-One PC Hardware Maintenance Manual

Chapter 11. Additional Service Information This chapter provides additional information that the service representative might find helpful. Power management Power management reduces the power consumption of certain components of the computer such as thesystem power supply, processor, hard disk drive...