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 Lenovo C240/245/255 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 Lenovo C240/C245/C255 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 Safe...
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 Lenovo C240/C24...
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 25 - Hard disk drive boot error; A hard disk drive boot error can have the following causes.; 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; POST; 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; Front view
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...
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. 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 ...
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 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...
Page 30 - Hardware components
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 ...
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 thatcan be installed later. The following illustration s...
Page 33 - Chapter 8. Replacing hardware; General information; Pre-disassembly instructions; Turn off the power to the system and all peripherals.
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 34 - Replacing the keyboard and mouse; To replace the keyboard and mouse:; Replacing the optical drive; To replace the optical drive:; Unplug all power cords from electrical outlets.
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 36 - Secure the optical drive to the chassis using the screw.; Replacing the power adapter; To replace the power adapter:; Locate the connector for the power cord. Refer to “Rear view”.
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...
Page 37 - Removing the rear cover; To remove the rear cover:
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...
Page 38 - Replacing a memory module; To replace a memory module:; Replacing the hard disk drive; To replace the hard disk drive:
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...
Page 39 - Replacing the heat-sink
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 40 - Replacing the system fan; To replace the system fan:
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 ...
Page 41 - Replacing the Wi-Fi card
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...
Page 42 - Replacing the speaker system; To replace the speaker system:
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 ...
Page 43 - Replacing the front indicator board; To replace the front indicator board:
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...
Page 44 - Replacing the power switch board; To replace the power switch board:
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...
Page 45 - Replacing the motherboard; To replace the motherboard:
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...
Page 47 - Replacing the computer stand; To replace the computer stand:; Replacing the camera; To replace the camera:
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...
Page 48 - Replacing the converter board; To replace the converter 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 49 - Replacing the LED panel; To replace the LED panel:
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...
Page 51 - Jumper Head
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...
Page 52 - Step 13. Reattach the rear cover and secure it with the screws.
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
Page 63 - Chapter 11. Additional Service Information; Power management; This can be either a single event , a daily event or a weekly event.
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...
