Dell Inspiron N4020 - Page 4

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5. Replace the I/O board (see Replacing the I/O Board).
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6. Follow the instructions from step 6 to step 18 in Replacing the System Board.
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CAUTION: Before turning on the computer, replace all screws and ensure that no stray screws remain inside the computer. Failure to do so may
result in damage to the computer.