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Replacing a motherboard is a crucial step when upgrading or repairing a computer because it serves as the central backbone of the entire system. All critical components—such as the CPU, RAM, GPU, and storage devices—connect through the motherboard, making it essential for system performance, compatibility, and functionality. Over time, older motherboards may become outdated or fail due to wear, preventing users from running modern software or hardware. By replacing the motherboard, users can extend the life of their computer, improve performance, and take advantage of the latest technological advancements. In this guide you will learn how to replace the motherboard on a Toshiba Qosmio X775-3DV80.
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Turn your laptop over so the underside is facing up.
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Identify the two sliding locks on either side of the battery.
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Simultaneously slide both locks outward to release the battery.
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Pull the battery straight out of its slot to remove it.
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Locate the optical drive retaining screw on the underside of the laptop.
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Using a Phillips #00 screwdriver, remove the optical drive retaining screw.
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Using your finger or a spudger, push the optical drive out of its compartment so you can grab it.
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Pull the optical drive out of its slot in the side of the laptop.
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Loosen the single screw on the service panel by twisting counterclockwise with a Phillips #00 screwdriver.
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Using a spudger or plastic opening tool, pry off the service panel.
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Using your fingers, pull the retaining clips away from the RAM sticks.
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Pull the RAM sticks out of the slots.
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Using a Phillips #00 screwdriver, remove all the remaining fourteen screws from the bottom case of the laptop.
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Using a Phillips #00 screwdriver, remove the five screws under the service panel.
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Remove the retaining clip.
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Using a spudger, pry the keyboard from the top panel of the laptop.
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Disconnect the two ribbon cables connecting the keyboard to the laptop.
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Unplug the connector on the bottom of the laptop.
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Separate the two halves of the base of the laptop.
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Using a Phillips #00 screwdriver, remove the four screws securing the fan assembly to the laptop.
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Unplug the fan-motherboard connector.
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Remove the fan unit.
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Detach the two coaxial connections from the wifi chip.
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Using a Phillips #00 screwdriver, remove the two screws from the wifi chip.
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Remove the wifi chip by pulling it out of the PCIe slot.
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Disconnect the three ribbon cables.
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Using a Phillips #00 screwdriver, remove the four screws securing the motherboard to the laptop.
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Remove the 4-pin connector housing by gently wiggling it back and forth.
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To reassemble your device, follow these instructions in reverse order.
To reassemble your device, follow these instructions in reverse order.