Lenovo IdeaCentre B345, Hardware Maintenance Manual

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Step 5. Remove the computer stand. Refer to “Removing the computer stand”.
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”.
Step 9. Remove the three screws that secure the rear I/O module and metal bracket to the chassis.
Step 10. Lift up the rear I/O module.
Step 11. Disconnect the TV antenna cable from the rear I/O module by removing the 2 screws.
Step 12. Remove the screw that secure the rear I/O module to the metal bracket. 1
Step 13. Lift up the rear I/O module to remove it from the metal bracket.
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Step 14. To install the new rear I/O module:
a. Line the new I/O module with metal bracket, then secure it with the screw.
b. Reattach the TV antenna cable to the rear I/O module, secure it with the two screws.
c. Line the new I/O module up with the chassis then secure it with the screws.
Step 15. Reattach the EMI cover, middle cover, optical drive, computer stand and the rear cover.
Replacing the Wi-Fi card
Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover.
To replace the Wi-Fi card:
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IdeaCentre B345–B545 All-In-OneHardware Maintenance Manual