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LG Optimus 3D Motherboard Replacement

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The motherboard is the main internal communication component that brings all the various inputs together.

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  1. LG Optimus 3D Motherboard Replacement, Back Cover Removal: crwdns2935265:01crwdnd2935265:01crwdnd2935265:02crwdne2935265:0 LG Optimus 3D Motherboard Replacement, Back Cover Removal: crwdns2935265:01crwdnd2935265:02crwdnd2935265:02crwdne2935265:0

    • Pry the back cover off of the phone with your fingernail. There is a notch located at the bottom of the phone for improved leverage.

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  2. LG Optimus 3D Motherboard Replacement, Battery Removal: crwdns2935265:02crwdnd2935265:01crwdnd2935265:03crwdne2935265:0 LG Optimus 3D Motherboard Replacement, Battery Removal: crwdns2935265:02crwdnd2935265:02crwdnd2935265:03crwdne2935265:0 LG Optimus 3D Motherboard Replacement, Battery Removal: crwdns2935265:02crwdnd2935265:03crwdnd2935265:03crwdne2935265:0

    • The battery is the large black rectangle towards the bottom half of the phone.

    • There is a semi-circular notch at the bottom edge of the battery. Press against and up on the battery to pop it out.

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  3. LG Optimus 3D Motherboard Replacement, Screw Removal: crwdns2935265:03crwdnd2935265:01crwdnd2935265:02crwdne2935265:0 LG Optimus 3D Motherboard Replacement, Screw Removal: crwdns2935265:03crwdnd2935265:02crwdnd2935265:02crwdne2935265:0

    • Remove 9 screws from the phone. The locations of these screws are circled in the picture.

    • 5.5mm length PH00 screws

    • 4mm length PH00 screws

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  4. LG Optimus 3D Motherboard Replacement, Bottom Cover Removal: crwdns2935265:04crwdnd2935265:01crwdnd2935265:02crwdne2935265:0 LG Optimus 3D Motherboard Replacement, Bottom Cover Removal: crwdns2935265:04crwdnd2935265:02crwdnd2935265:02crwdne2935265:0

    • Gently pull down on the bottom cover to remove it.

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  6. LG Optimus 3D Motherboard Replacement, Mid-Cover Bezel Removal: crwdns2935265:05crwdnd2935265:01crwdnd2935265:03crwdne2935265:0 LG Optimus 3D Motherboard Replacement, Mid-Cover Bezel Removal: crwdns2935265:05crwdnd2935265:02crwdnd2935265:03crwdne2935265:0 LG Optimus 3D Motherboard Replacement, Mid-Cover Bezel Removal: crwdns2935265:05crwdnd2935265:03crwdnd2935265:03crwdne2935265:0

    • Using a plastic opening tool, gently pry around the perimeter of the device.

    • The ribbons behind the buttons and ports are very delicate. Make sure you do not run your plastic opening tool too deep into the bezel, as you could damage them.

    • The button covers rest under the Mid-Cover Bezel. Remove them and set aside.

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  7. LG Optimus 3D Motherboard Replacement, Ribbon Cable Disconnection: crwdns2935265:06crwdnd2935265:01crwdnd2935265:02crwdne2935265:0 LG Optimus 3D Motherboard Replacement, Ribbon Cable Disconnection: crwdns2935265:06crwdnd2935265:02crwdnd2935265:02crwdne2935265:0

    • Using a spudger or plastic opening tool, gently disconnect the ribbon cable attached to the black SIM card board.

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  8. LG Optimus 3D Motherboard Replacement, Adhesive Loosening: crwdns2935265:07crwdnd2935265:01crwdnd2935265:01crwdne2935265:0

    • Use a hair-dryer on high, or a heat-gun on low to heat the device and loosen the adhesive which holds down the SD/SIM Card Board.

    • Evenly heat the device in short intervals for about one minute.

    • Do not heat the device for more than 30 seconds at a time to prevent over-heating.

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  9. LG Optimus 3D Motherboard Replacement, SD/SIM Card Board Removal: crwdns2935265:08crwdnd2935265:01crwdnd2935265:03crwdne2935265:0 LG Optimus 3D Motherboard Replacement, SD/SIM Card Board Removal: crwdns2935265:08crwdnd2935265:02crwdnd2935265:03crwdne2935265:0 LG Optimus 3D Motherboard Replacement, SD/SIM Card Board Removal: crwdns2935265:08crwdnd2935265:03crwdnd2935265:03crwdne2935265:0

    • Gently pry the board up to release it from the now soft adhesive. Make sure you pry up the little tab connected to the camera unit as well.

    • If the board is too difficult to separate than more heating may be required.

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  10. LG Optimus 3D Motherboard Replacement, Disconnect Ribbon Cables: crwdns2935265:09crwdnd2935265:01crwdnd2935265:02crwdne2935265:0 LG Optimus 3D Motherboard Replacement, Disconnect Ribbon Cables: crwdns2935265:09crwdnd2935265:02crwdnd2935265:02crwdne2935265:0

    • Using a spudger or plastic opening tool, gently lift the ribbon cables connected to the motherboard.

    • The button tabs, highlighted in orange, are held in with a light adhesive. Gently lift them out of the body of the phone with a spudger.

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  11. LG Optimus 3D Motherboard Replacement, Disconnect Antenna: crwdns2935265:010crwdnd2935265:01crwdnd2935265:02crwdne2935265:0 LG Optimus 3D Motherboard Replacement, Disconnect Antenna: crwdns2935265:010crwdnd2935265:02crwdnd2935265:02crwdne2935265:0

    • Remove the antenna cable by disconnecting both ends.

    • One end connects to the motherboard and the other connects near bottom of the phone.

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  12. LG Optimus 3D Motherboard Replacement, Remove Motherboard: crwdns2935265:011crwdnd2935265:01crwdnd2935265:02crwdne2935265:0 LG Optimus 3D Motherboard Replacement, Remove Motherboard: crwdns2935265:011crwdnd2935265:02crwdnd2935265:02crwdne2935265:0

    • Using a spudger gently lift the motherboard assembly out of the case.

    • Make sure the motherboard does not get snagged on the camera's ribbon cable.

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To reassemble your device, follow these instructions in reverse order.

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Dale Pearson

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