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Acer Aspire 5742 CMOS Battery Replacement

Introduction

Removal of the CMOS battery is a very quick and simple procedure. The CMOS battery will lose its charge over time and cannot be recharged, therefore you will need to replace it from time to time (very infrequently). No special caution is needed to follow this guide other than to be gentle with the laptop and do not to touch any electrical components not mentioned in the guide.

What you need

  1. Acer Aspire 5742 CMOS Battery Replacement, Battery: step 1, image 1 of 3 Acer Aspire 5742 CMOS Battery Replacement, Battery: step 1, image 2 of 3 Acer Aspire 5742 CMOS Battery Replacement, Battery: step 1, image 3 of 3

    • Move the battery catch to the "unlocked" position.

    • Pull back the second spring-loaded battery catch until the battery pops up.

    • Remove the battery.

    Edit

  2. Acer Aspire 5742 CMOS Battery Replacement, Cover Panel: step 2, image 1 of 3 Acer Aspire 5742 CMOS Battery Replacement, Cover Panel: step 2, image 2 of 3 Acer Aspire 5742 CMOS Battery Replacement, Cover Panel: step 2, image 3 of 3

    • Turn the notebook around to face you.

    • There are two Phillips #00 screws securing the cover panel to the rest of the notebook. Remove these screws.

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  4. Acer Aspire 5742 CMOS Battery Replacement: step 3, image 1 of 3 Acer Aspire 5742 CMOS Battery Replacement: step 3, image 2 of 3 Acer Aspire 5742 CMOS Battery Replacement: step 3, image 3 of 3

    • Use a spudger to release the panel from the plastic retaining clips keeping it in place.

    • Do not apply too much force, or you may break the clips.

    • Remove the panel and set it aside.

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  5. Acer Aspire 5742 CMOS Battery Replacement, CMOS Battery: step 4, image 1 of 2 Acer Aspire 5742 CMOS Battery Replacement, CMOS Battery: step 4, image 2 of 2

    • After removing the cover panel, you will see the hard drive, the RAM, and the CMOS battery.

    • The CMOS battery is the silver coin-like object in the center.

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  6. Acer Aspire 5742 CMOS Battery Replacement: step 5, image 1 of 3 Acer Aspire 5742 CMOS Battery Replacement: step 5, image 2 of 3 Acer Aspire 5742 CMOS Battery Replacement: step 5, image 3 of 3

    • Press the tip of the spudger underneath the CMOS battery with very slight force.

    • Press down on the opposite side of the battery while prying the battery upward with the spudger.

    • After the battery is mostly lifted from the slot, you may pull out the battery with your fingers.

    Edit
Conclusion

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

8 other people completed this guide.

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Bill Murray

Member since: 10/24/16

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Team

UMass Dartmouth, Team 2-6, Isaacson Fall 2016 Member of UMass Dartmouth, Team 2-6, Isaacson Fall 2016

UMASSD-ISAACSON-F16S2G6

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