Lenovo 0126/90A5, Maintenance Manual

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Step 4. Remove the computer cover. Refer to “Removing the computer cover”.
Step 5. Remove the front bezel. Refer to “Removing the front bezel”.
Step 6. Remove the optical drive. Refer to “Replacing the optical drive”.
Step 7. Remove the hard disk drive. Refer to “Replacing the hard disk drive”.
Step 8. Remove the power supply. Refer to “Replacing the power supply”.
Step 9. Disconnect the data cables from the connectors on motherboard.
Step 10. Remove the screw that secures the front USB/card reader/audio module to the chassis.
Step 11. Slide out the front USB/card reader/audio module out of chassis.
Step 12. Install the new front USB/card reader/audio module:
a. Slide the front USB/card reader/audio module in and secure it with screw.
b. Connect the data cables to the motherboard.
c. Reattach the power supply, hard disk drive and optical drive.
Step 13. Reattach the front bezel, computer cover.
Replacing the motherboard
Note: For this procedure, it helps to lay the computer flat.
To replace the motherboard:
Step 1. Remove any media (disks, CDs, DVDs, or memory cards) from the drives, shut down the operating
system, 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, 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 computer cover. Refer to “Removing the computer cover”.
Step 5. Remove the front bezel. Refer to “Removing the front bezel”.
Step 6. Remove the memory module. Refer to “Replacing a memory module”.
Step 7. Remove the optical drive. Refer to “Replacing the optical drive”.
Step 8. Remove the hard disk drive. Refer to “Replacing the hard disk drive”.
Step 9. Remove the microprocessor fan. Refer to “Replacing the microprocessor fan”.
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Lenovo H515sHardware Maintenance Manual