Chapter 1. About this manual This manual contains service and reference information for IdeaCentre B350–B355 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.
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– Blowers and fans – Motor generators and similar units. (This practice ensures correct grounding of the units.) • If an electrical accident occurs: – Use caution; do not become a victim yourself. – Switch off power. IdeaCentre B350–B355Hardware Maintenance Manual...
– Send another person to get medical aid. Safety inspection guide The intent of this inspection guide is to assist you in identifying potentially unsafe conditions on these products. Each machine, as it was designed and built, had required safety items installed to protect users and service personnel from injury.
• Connect and disconnect cables as described in the following table when installing, moving, or opening covers on this product or attached devices. IdeaCentre B350–B355Hardware Maintenance Manual...
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To Connect To Disconnect 1. Turn everything OFF. 1. Turn everything OFF. 2. First, attach all cables to devices. 2. First, remove power cords from outlet. 3. Attach signal cables to connectors. 3. Remove signal cables from connectors. 4. Attach power cords to outlet. 4.
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To remove all electrical current from the device, ensure that all power cords are disconnected from the power source. CAUTION: Do not place any object weighing more than 82 kg (180 lbs.) on top of rack-mounted devices. IdeaCentre B350–B355Hardware Maintenance Manual...
1. If your computer is already on when you start this procedure, shut down the operating system and turn off the computer. 2. Press and hold the F1 key then turn on the computer. When the Lenovo BIOS Setup Utility program is displayed, release the F1 key.
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5. Select Save changes and Exit from the menu. Power-On Password When a Power-On Password is set, you cannot start the Lenovo BIOS Setup Utility program until a valid password 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 character (a-z, and 0-9).
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.
Selecting or changing the startup device sequence To view or permanently change the configured startup device sequence, 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 Lenovo BIOS Setup Utility program main menu, select the Startup option.
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. You might have to press the Esc key several times. Do one of the following: •...
3. Power-on the computer to re-test the system. 4. Repeat steps 1 through 3 until you find the failing device or component. If all devices and components have been removed and the problem continues, replace the system board. IdeaCentre B350–B355Hardware Maintenance Manual...
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The following illustration shows the location of connectors, controls and components on the left and right side of the computer. 5. Microphone connector 1. Optical drive 2. Power button 6. USB 3.0 connector 7. Memory card reader 3. USB 3.0 connector 4. Headphone connector IdeaCentre B350–B355Hardware Maintenance Manual...
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Rear view The following illustration shows the location of connectors and components on the rear of the computer. 1. TV tuner port (selected models only) 5. Ethernet connector 2. HDMI-out connector (selected models only) 6. Power connector 3. USB 3.0 connectors (2) (selected models only) 7.
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Identifying parts on the B350 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 that you can install later. The following illustration shows the location of connectors and components on the front of the motherboard.
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21. Speaker connector 22. Battery 9. B-CAS connector 10. TV-Tuner card connector 23. Memory slot 11. ODD power connector 24. CPU Socket 12. Front function board connector 25. Motherboard power connector 2 13. HDD SATA connector IdeaCentre B350–B355Hardware Maintenance Manual...
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 Warranty Guide, go to the Support Web site at: http://consumersupport.lenovo.com. Note: Use only parts provided by Lenovo.
Remove any media (diskettes, CDs, DVDs, or memory cards) from the drives, shut down your operating system, and turn off all attached devices and the computer. Step 2. Locate the connector for the power cord. Refer to “Rear view”. IdeaCentre B350–B355Hardware Maintenance Manual...
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 protect the computer screen from scratches or other damage.
Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover. Note: For this procedure, it helps to place the computer face-down on a soft flat surface. Lenovo recommends that you use a blanket, towel, or other soft cloth to protect the screen surface from scratches or other damage.
Attention: 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 scratches or other damage.
Attention: 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 scratches or other damage.
Step 5. Push then slide the hard disk drive and bracket upward and out of the chassis as shown. Step 6. Push the pins and release the hard disk drive from the bracket. Step 7. Install the new hard disk drive as follows: Line up the new hard disk drive with the bracket and secure it with the pins.
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Step 7. Remove the 2 screws that secure the optical drive to the metal bracket. Step 8. Use a small flat head screwdriver to press and push out the pins that secure the cover to the disk. IdeaCentre B350–B355Hardware Maintenance Manual...
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 surface for this procedure. Lenovo recommends that you use a blanket, towel, or other soft cloth to protect the computer screen from scratches or other damage.
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 surface for this procedure. Lenovo recommends that you use a blanket, towel, or other soft cloth to protect the computer screen from scratches or other damage.
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 surface for this procedure. Lenovo recommends that you use a blanket, towel, or other soft cloth to protect the computer screen from scratches or other damage.
Step 6. Remove the optical drive. Refer to “Replacing the optical drive”. Step 7. Remove the middle cover. Refer to “Removing the middle cover”. Step 8. Remove the EMI cover. Refer to “Removing the EMI cover”. IdeaCentre B350–B355Hardware Maintenance Manual...
Step 9. Disconnect the speaker cable from the connectors on motherboard. Step 10. Detach the speaker system from the rubber screws. Step 11. To install the new speaker system: Secure the new speaker system to the chassis with the rubber screws. Connect the new speaker cable to motherboard.
Step 6. Remove the optical drive. Refer to “Replacing the optical drive”. Step 7. Remove the middle cover. Refer to “Removing the middle cover”. Step 8. Remove the EMI cover. Refer to “Removing the EMI cover”. IdeaCentre B350–B355Hardware Maintenance Manual...
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 protect the computer screen from scratches or other damage.
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 surface for this procedure. Lenovo recommends that you use a blanket, towel, or other soft cloth to protect the computer screen from scratches or other damage.
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 surface for this procedure. Lenovo recommends that you use a blanket, towel, or other soft cloth to protect the computer screen from scratches or other damage.
Step 10. Remove the heat-sink. Refer to “Replacing the heat-sink”. Step 11. Lift the small handle and open the retainer. Attention: Do not touch the gold contacts on the bottom of the microprocessor. When handing the microprocessor, touch only the sides. IdeaCentre B350–B355Hardware Maintenance Manual...
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Step 12. Lift the microprocessor straight up and out of the socket. Attention: Do not touch the gold contacts on the bottom of the microprocessor. When handing the microprocessor, touch only the sides. Note: Do not drop anything onto the microprocessor socket while it is exposed. The socket pins must be kept as clean as possible.
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 surface for this procedure. Lenovo recommends that you use a blanket, towel, or other soft cloth to protect the computer screen from scratches or other damage.
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 surface for this procedure. Lenovo recommends that you use a blanket, towel, or other soft cloth to protect the computer screen from scratches or other damage.
Step 13. Remove the TV scalar board. Refer to “Replacing the TV scalar board”. Step 14. Remove the Wi-Fi card. Refer to “Replacing the Wi-Fi card”. Step 15. Remove the TV tuner card. Refer to “Replacing the TV tuner card”. Step 16. Remove the TV antenna connector as shown. IdeaCentre B350–B355Hardware Maintenance Manual...
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Step 17. Remove all the cables connected to the motherboard, including: LVDS cable Hard disk drive power and SATA cables. Optical disk drive power and SATA cables. Power supply cables Converter cable Speaker cable Camera cable Power board cable Front function board cable Front indicator board cable B-CAS card cable Step 18.
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 surface for this procedure. Lenovo recommends that you use a blanket, towel, or other soft cloth to protect the computer screen from scratches or other damage.
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Converter cable Power board cable Step 22. To install the new the LED panel module: Attached the two feet to the chassis and secure them with the two screws. Attach the motherboard to the chassis, and secure it with the screws. Attach the Wi-Fi antenna cables to the front bezel.
B350 CONVERTER CABLE TO PANEL 90204095 90204096 B350 CONVERTER CABLE TO MB B350 HDD/ODD SATA CABLE 90204097 90204099 B350 CAMERA CABLE FOR SINGLE MIC B350 POWER BOARD TO FUNCTION BOARD CABLE 90204101 90204100 B350 LVDS CABLE B355 LVDS CABLE 90204134 90204094 Speaker...
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TV tuner TV tuner Avermedia H339BB DVB-T Mini TV Card 11200290 11201071 Avermedia H334 DVB-T Mini TV Card Avermedia H339BA ATSC Mini TV Card 11200291 11201072 Avermedia H334 ATSC Mini TV Card Sony SMT-SJ910PV ISDB-TS TV card 11200977 31044060 IC A7 TV label_Japan(C/L)® 11012251 B-cas BS/CS 地上...