Introduction
Use this guide to replace the Asus Zen AiO Pro Z240IC's motherboard to fix boot-up issues. No prior knowledge is required. All you need is a Phillips head screwdriver and plastic opening tools.
What you need
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Use the plastic opening tool to pry off the black plastic strip at the bottom of the screen by wiggling the tool between the strip and the screen.
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Run the opening tool slowly along the base of the screen, peeling the black strip back, until the opposite end of the screen is reached.
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Use a Phillips #1 screwdriver to remove the seven (7) 4.8 mm screws from the base of the screen.
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Place the computer on its back, facing up.
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Wedge the plastic opening tool in between the screen and the bezel of the aluminum computer casing.
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Move the tool along the entire edge of the screen with an up-and-down prying motion to loosen the screen from the casing. Do not lift the entire screen away from the computer yet.
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Lift the screen from the bottom edge by about 6 inches. Prop it open with one hand.
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Look inside the computer and locate five (5) cables that connect the embedded components of the screen (camera, microphone, etc.) to the rest of the computer.
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Remove the two (2) cables that are connected to the computer by white, rectangular terminal blocks by pulling straight out on the plug.
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Use a finger to lift the plastic locking flaps that hold the remaining three (3) ribbon cables in place.
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Remove the cables from their terminals by slipping them away from their connectors.
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Locate the WLAN card in the upper left hand corner of the computer.
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Use a Phillips #1 screwdriver to remove the 3.2 mm screw on the top of the WLAN card.
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Pull out the WLAN card from its socket.
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Remove the two antennae wires from the WLAN card by pulling up on the coaxial connectors.
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Use a Phillips #0 screwdriver to remove the three (3) 4.8 mm screws from the fan unit.
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Remove the cable connecting the fan to the motherboard by pulling the cable out of its socket.
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Remove the fan by peeling off the black electrical tape holding it against the heat sink vents.
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Remove the six (6) ribbon cables by lifting up on the plastic locking tabs and then slipping the cables out of their sockets.
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Remove the other two (2) cables by pulling straight out on the white connectors.
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Use a Philips #1 screwdriver to remove nine (9) 3.2 mm screws from the motherboard.
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Use a Philips #1 screwdriver to remove the one (1) 4.8 mm screw directly below the copper heat sink channel.
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Lift the motherboard just enough to dismount it from the plastic pegs that hold it in place.
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Rotate the motherboard towards yourself while supporting the heat sink by pivoting on its bottom edge.
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Remove the SATA cable on the opposite side of the motherboard by pulling directly up from the board.
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