LENOVO THINKCENTRE NEO 55S GEN 6 (01) PDF Document

To ensure general safety when maintaining your LENOVO THINKCENTRE NEO 55S GEN 6, follow these rules:

• Observe good housekeeping in the area of the machines during and after maintenance.

• When lifting any heavy object:

1. Ensure you can stand safely without slipping.

2. Distribute the weight of the object equally between your feet.

3. Use a slow lifting force. Never move suddenly or twist when you attempt to lift.

4. Lift by standing or by pushing up with your leg muscles; this action removes the strain from the muscles in your back.

Attention: Do not attempt to lift any objects that weigh more than 16 kg (35 lb) or objects that you think are too heavy for you.

• Do not perform any action that causes hazards to the customer, or that makes the equipment unsafe.

• Before you start the machine, ensure that other people are not in a hazardous position.

• Place removed covers and other parts in a safe place, away from all personnel, while you are servicing the machine.

• Keep your tool case away from walk areas so that other people will not trip over it.

• Do not wear loose clothing that can be trapped in the moving parts of a machine. Ensure that your sleeves are fastened or rolled up above your elbows. If your hair is long, fasten it.

• Insert the ends of your necktie or scarf inside clothing or fasten it with a nonconductive clip, approximately 8 centimeters (3 inches) from the end.

• Do not wear jewelry, chains, metal-frame eyeglasses, or metal fasteners for your clothing. Metal objects are good electrical conductors.

• Wear safety glasses when you are: hammering, drilling, soldering, cutting wire, attaching springs, using solvents, or working in any other conditions that might be hazardous to your eyes.

• After service, reinstall all safety shields, guards, labels, and ground wires. Replace any safety device that is worn or defective.

• Reinstall all covers correctly before returning the machine to the customer.

CAUTION: Keep fingers and other parts of your body away from hazardous, moving parts. If you suffer an injury, seek medical care immediately.

CAUTION: Avoid contact with hot components inside the computer. During operation, some components become hot enough to burn the skin. Before you open the computer cover, turn off the computer, disconnect power, and wait approximately 10 minutes for the components to cool.

CAUTION: Electrical current from power, telephone, and communication cables can be hazardous. To avoid personal injury or equipment damage, disconnect the attached power cords, telecommunication systems, networks, and modems before you open the computer covers, unless instructed otherwise in the installation and configuration procedures.

Observe the following rules when working on electrical equipment:

• Find the room emergency power-off (EPO) switch, disconnecting switch, or electrical outlet. If an electrical accident occurs, you can then operate the switch or unplug the power cord quickly.

• Do not work alone under hazardous conditions or near equipment that has hazardous voltages.

• Disconnect all power before performing a mechanical inspection, working near power supplies, or removing or installing Field Replaceable Units (FRUs).

• Before you start to work on the machine, unplug the power cord. If you cannot unplug it, ask the customer to power-off the wall box that supplies power to the machine and to lock the wall box in the off position.

• If you need to work on a machine that has exposed electrical circuits, ensure that another person, familiar with the power-off controls, is near you to switch off the power if necessary.

• Use only one hand when working with powered-on electrical equipment; keep the other hand in your pocket or behind your back.

• Regularly inspect and maintain your electrical hand tools for safe operational condition.

• Do not use worn or broken tools and testers.

• Never assume that power has been disconnected from a circuit. First, check that it has been powered-off.

• Always look carefully for possible hazards in your work area, such as moist floors, nongrounded power extension cables, power surges, and missing safety grounds.

• Do not service parts like power supply units, pumps, blowers, fans, and motor generators with the power on when they are removed from their normal operating places in a machine.

This inspection guide helps identify potentially unsafe conditions. Begin the checks with the power off and the power cord disconnected.

Checklist:

1. Check exterior covers for damage (loose, broken, or sharp edges).

2. Power-off the computer. Disconnect the power cord.

3. Check the power cord for:

a. A third-wire ground connector in good condition. Use a meter to measure third-wire ground continuity for 0.1 ohm or less between the external ground pin and frame ground.

b. The power cord should be the appropriate type as specified in the parts listings.

c. Insulation must not be frayed or worn.

4. Remove the cover.

5. Check for any obvious alterations. Use good judgment as to the safety of any alterations.

6. Check inside the unit for any obvious unsafe conditions, such as metal filings, contamination, water or other liquids, or signs of fire or smoke damage.

7. Check for worn, frayed, or pinched cables.

8. Check that the power-supply cover fasteners (screws or rivets) have not been removed or tampered with.

Any computer part containing transistors or integrated circuits (ICs) is sensitive to electrostatic discharge (ESD). Protect against ESD damage by equalizing the charge so that the machine, the part, the work mat, and the person handling the part are all at the same charge.

When handling ESD-sensitive parts:

• 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 and retains a charge even when you are wearing a wrist strap.

• Use the black side of a grounded work mat to provide a static-free work surface.

• Select a grounding system to provide protection that meets the specific service requirement. Examples include:

– Attach the ESD ground clip to any frame ground, ground braid, or green-wire ground.

– Use an ESD common ground or reference point when working on a double-insulated or battery-operated system.

– Use the round ground-prong of the ac plug on ac-operated computers.

Before replacing parts, ensure that all software fixes, drivers, and UEFI BIOS downloads are installed.

Use the following strategy to prevent unnecessary expense for replacing and servicing FRUs:

• If you are instructed to replace a FRU but the replacement does not correct the problem, reinstall the original FRU before you continue.

• Some computers have both a processor board and a system board. If you are instructed to replace either board and the first replacement does not correct the problem, reinstall that board, and then replace the other one.

• If an adapter or a device consists of more than one FRU, any of the FRUs might be the cause of the error. Before replacing the entire adapter or device, remove its FRUs one by one to see if the symptoms change. Replace only the FRU that changed the symptoms.

Always try to run a low-level format operation before replacing a hard disk drive or a solid-state drive. This will cause all customer data on the drive to be lost. Ensure that the customer has a current backup of the data before you perform this task.

Attention: The drive startup sequence in the computer you are servicing might have been changed. Be extremely careful during write operations such as copying, saving, or formatting. If you select an incorrect drive, data or programs can be overwritten.

Some components on a system board are very sensitive, and improper handling can cause damage and system malfunction.

Attention: When handling a system board:

• Do not drop a system board or apply any excessive force to it.

• Avoid rough handling of any kind.

• Avoid bending a system board and hard pushing to prevent cracking at each Ball Grid Array (BGA) chipset.

Use the following procedure to help determine the cause of a problem:

1. Turn off the computer and all external devices.

2. Check all cables and power cords.

3. Set all display controls to the middle position.

4. Turn on all external devices.

5. Turn on the computer.

• Look for displayed error codes.

• Listen for beep codes.

• Look for readable instructions or a main menu on the display.

If you did not receive the correct response, proceed to step 6.

If you do receive the correct response, proceed to step 7.

6. Look at the following conditions and follow the instructions:

• If you hear beep codes during POST, go to “Beep symptoms”.

• If the computer displays a POST error, go to “POST error codes”.

• If the computer hangs and no error is displayed, continue at step 7.

7. Run the Diagnostic programs.

• If you receive an error, replace the part that the diagnostic program calls out.

• If the test stops and you cannot continue, replace the last device tested.

A hard disk drive boot error can have the following causes and solutions:

If you suspect a power problem, use the following procedures:

Beep symptoms are tones or a series of tones separated by pauses during POST. The following table describes the beep symptoms:

1. Remove all media from the drives and turn off all connected devices.

2. Insert the BIOS update disc into the optical drive, and then turn off the computer.

3. Disconnect all power cords from electrical outlets. Then, remove any parts that impede access to the Clear CMOS jumper.

4. Move the jumper from the standard position to the Clear CMOS position.

5. Reconnect the power cords for the computer and the monitor to electrical outlets.

6. Turn on the computer and the monitor. When the computer beeps, the recovery process begins.

7. After the recovery process is completed, the computer will be turned off automatically.

Note: Depending on the computer model, the recovery process will take two to three minutes.

8. Disconnect all power cords from electrical outlets.

9. Move the jumper back to the standard position.

10. Reinstall all the parts that have been removed. Then, reconnect the power cords for the computer and the monitor to electrical outlets.

11. Turn on the computer and the monitor. When the logo screen is displayed, press F1 or Fn+F1.

12. To prevent data loss, ensure that BIOS settings are restored to an earlier point.

1. Remove all media from the drives and turn off all connected devices and the computer.

2. Disconnect all power cords from electrical outlets. Then, remove any parts that impede access to the Clear CMOS jumper.

3. Move the jumper from the standard position to the Clear CMOS position.

4. Reconnect the power cords for the computer and the monitor to electrical outlets.

5. Turn on the computer and the monitor. When the computer beeps, wait for approximately 10 seconds.

6. Turn off the computer by holding the power button for approximately four seconds.

7. Disconnect all power cords from electrical outlets.

8. Move the jumper back to the standard position.

9. Reinstall all the parts that have been removed. Then, reconnect the power cords for the computer and the monitor to electrical outlets.

10. Turn on the computer and the monitor. When the logo screen is displayed, press F1 or Fn+F1.

11. To prevent data loss, ensure that BIOS settings are restored to an earlier point.

Before you start, read the important safety information.

1. Check that:

a. The cables for all connected devices are connected correctly and securely.

b. All components have been reassembled correctly.

c. All connected devices that require ac power are connected to properly grounded and working electrical outlets.

d. All connected devices are enabled in UEFI BIOS.

2. Use an antivirus program to see if the computer has been infected by a virus. If the program detects a virus, remove the virus.

3. Use self-help resources for the type of problem you are experiencing.

4. Run the diagnostic program.

5. Recover your operating system.

6. If the problem persists, contact Lenovo.

A UEFI diagnostic program is preinstalled on the computer to test memory modules and internal storage devices, view system information, and recover bad sectors.

To run the UEFI diagnostic program, do the following:

1. Turn on the computer. If it cannot be turned on, refer to the “Basic procedure for resolving computer problems”. If an error code is displayed, refer to the “Symptom-to-FRU index”.

2. Repeatedly press and release the F10 key when turning on the computer. The main screen of the UEFI diagnostic program is displayed.

3. Follow the instructions on the screen to use the diagnostic program.

Your computer contains the following types of Customer Replaceable Units (CRUs) and Field Replaceable Units (FRUs):

• Self-service CRUs: Refer to parts that can be replaced easily by customer themselves or by trained service technicians at an additional cost.

• Optional-service CRUs: Refer to parts that can be replaced by customers with a greater skill level. Trained service technicians can also provide service to replace the parts under the type of warranty designated for the customer’s machine.

• FRUs: Refer to parts that must be replaced only by trained service technicians. If customers choose to replace the FRUs by themselves, the product warranty might be affected.

Before you open the computer cover, turn off the computer and wait several minutes until the computer is cool.

For access, do the following:

1. Remove any media from the drives and turn off all connected devices and the computer.

2. Disconnect all power cords from electrical outlets and disconnect all cables from the computer.

To remove the vertical stand, simply pick up the computer and remove the stand from its base.

Before starting, turn off the computer and wait for it to cool down.

For access, do the following:

1. Remove any media from the drives and turn off all connected devices and the computer.

2. Disconnect all power cords from electrical outlets and disconnect all cables from the computer.

3. Unlock any locking device that secures the computer cover.

4. Remove the vertical stand.

5. Lay down the computer to place the computer cover facing up.

Removal steps:

1. Remove the two screws (#6-32 x L8, Hexhead) which secure the computer cover to the chassis, one screw at each edge. The recommended torque is 3± 0.5 lb/in.

2. Pull the computer cover to remove it.

Before you begin, turn off the computer and let it cool.

For access, do the following:

1. Remove the computer cover.

2. Disconnect the PCI-Express cables from the system board if any.

Removal steps:

1. Pivot the PCIe latch outwards.

2. Press the retaining latch at the end of the PCIe slot to unsecure the PCIe card.

3. Gently pull the PCIe card out of the PCIe slot.

To install a new card, align it with the PCIe slot and press it firmly into place until the retaining latch clicks.

For access, remove the computer cover first.

Removal steps:

• Release three elastic hooks from the top of the front bezel.

Installation steps:

There are three swivel hooks at the bottom of the front bezel and three hook slots at the bottom of the front panel.

1. Insert the three swivel hooks into each hook slot.

2. Pivot the front bezel inwards to install it to the chassis.

Before you begin, turn off the computer and wait for it to cool.

For access, remove these parts in order:

• Computer cover

• Front bezel

Removal steps:

1. Remove the two screws (#6-32 x L8, Hexhead) that secure the drive bay assembly to the chassis. The recommended torque is 5 ± 0.5 lb/in.

2. Pivot the drive bay assembly upward, then remove it.

Installation steps:

1. Insert the drive bay assembly into the four holes on the chassis.

2. Pivot the drive bay assembly downward to install it to the chassis.

3. Secure the two screws.

Attention: The internal storage drive is sensitive. Inappropriate handling might cause damage and permanent loss of data. Observe these guidelines:

• Replace the drive only for repair. It is not designed for frequent changes.

• Back up all data before replacing the drive.

• Do not touch the contact edge of the drive.

• Do not apply pressure to the drive.

• Do not subject the drive to physical shocks. Place it on a soft material to absorb shocks.

For access, do the following:

1. Remove these parts in order: “Computer cover”, “Front bezel”, “Drive bay assembly”.

2. Disconnect the signal and power cables from the hard disk drive.

Removal steps:

1. Remove the four step-screws (#6-32) that secure the hard disk drive to the drive bay assembly (two on each side). The recommended torque is 5 ± 0.5 lb/in.

2. Remove the hard disk drive.

To install, reverse the removal steps.

For access, remove the following parts in order:

• “Computer cover”

• “Front bezel”

• “Drive bay assembly”

Removal steps:

1. Open the two retaining clips on the memory slot.

2. Gently pull the memory module out of the memory slot.

Installation steps:

• Align the memory module to the slot and press down on both ends until the latches are fully engaged with a click.

The heat sink might be very hot. Before you open the computer cover, turn off the computer and wait several minutes until the computer is cool.

For access, remove these parts in order: “Computer cover”, “Front bezel”, and “Drive bay assembly”.

Removal steps for type-1 M.2 solid-state drive (installed on system board):

1. Remove the screw (M2 x L4, black coated) securing the M.2 drive to the system board. The recommended torque is 1.5 ± 0.5 lb/in.

2. Remove the M.2 solid-state drive and thermal pad (if any).

Removal steps for type-2 M.2 solid-state drive (installed in a heatsink):

1. Remove the screw (M2 x L4, black coated) securing the heatsink to the system board. The recommended torque is 1.5 ± 0.5 lb/in.

2. Remove the heatsink.

3. Pinch the two latches on top of the heatsink to remove the heatsink cover.

4. Remove the M.2 solid-state drive and thermal pad (if any).

Note: Remove the film that covers the thermal pad (if any) when installing a new M.2 solid-state drive, heat sink, and thermal pad.

For access, do the following:

1. Remove these parts in order: “Computer cover”, “Front bezel”, and “Drive bay assembly”.

2. Disconnect the power supply assembly cables from the system board.

Removal steps:

1. Remove the three screws (#6-32 x L8, Hexhead) which secure the power supply assembly to the chassis. The recommended torque is 5 ± 0.5 lb/in.

2. Press the retaining clip from inside of the chassis.

3. Push the power supply assembly inwards to remove it.

CAUTION: The CPU cooler might be very hot. Before you open the computer cover, turn off the computer and wait several minutes until the computer is cool.

For access, do the following:

1. Remove these parts in order: “Computer cover”, “Front bezel”, “Drive bay assembly”.

2. Disconnect the CPU cooler cable from the system board.

Removal steps:

Note: Ensure the CPU cooler is horizontal when loosening or fastening screws. Do not touch the thermal grease.

1. Partially loosen the four screws in the specified sequence: top right, bottom left, bottom right, top left. Then fully loosen all screws in the same order.

2. Remove the CPU cooler.

Installation steps:

To install the CPU cooler, partially tighten all four screws in the same sequence as removal, then fully tighten all screws in the same order to secure the cooler to the system board.

Note: Before attaching the new heat sink, clean the used thermal pad and apply a new one. Place the new thermal pad (16 mm x 11 mm x 0.2 mm) on the designated area.

CAUTION: Avoid contact with hot components inside the computer. Turn off the computer, disconnect power, and wait approximately 10 minutes for components to cool.

Note: The failing system board must be returned with a CPU socket cover to protect the pins during shipping and handling.

For access, do the following:

1. Remove these parts in order, if any: “Air deflector”, “Vertical stand”, “Computer cover”, “Front bezel”, “Drive bay assembly”, “CPU cooler”, “PCIe card”, “Memory module”, “M.2 solid-state drive”, “Power supply assembly”, “Wi-Fi card”, “Front I/O bracket”.

2. Record the cable routing and connections, and then disconnect all cables from the system board.

Removal steps:

• Remove the eight screws (M3 x 8, Cheesehead) that secure the system board to the chassis. The recommended torque is 5 ± 0.5 lb/in. Then, push the system board toward the front panel, and remove it.

When installing:

• Clean all thermal grease that has been used and then apply new thermal grease if needed.