Acer Aspire 4540 Acer Aspire 4540 Series Service Guide - Page 152
Touchpad Failure, Internal Speaker Failure, Touchpad, Speakers
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Touchpad Failure If the Touchpad doesn't work, perform the following actions one at a time to correct the problem. Do not replace a non-defective FRUs: Internal Speaker Failure If the internal Speakers fail, perform the following actions one at a time to correct the problem. Do not replace a non-defective FRUs: 142 Chapter 4
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