Dell Vostro 3500 CMOS Battery Replacement
Philip Le Riche and 2 other contributors
Last updated on May 7, 2024
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Community-Contributed Guide
An awesome member of our community made this guide. It was not created by iFixit staff.
Introduction
Go to step 1 ↓Note that disconnecting the so-called CMOS battery does not reset the BIOS settings or clear a BIOS password. In fact its only purpose is to maintain the real time clock when no other power source is available.
The CMOS battery should last for around 10 years. If the computer forgets the date and time when you remove both the mains adapter and the main battery then you need to replace the CMOS battery.
What you need
Tools
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Flip the computer over.
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Slide the battery release latch to the unlock position.
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Slide the other battery release latch to the unlock position.
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Turn the laptop over and remove two screws securing the service cover.
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Prise up the service cover and remove it from the computer. Clips along the edges can be snapped open except for those on the left hand edge (as shown in the photo) which have to be disengaged after all the others by romoving the cover in the direction shown.
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On resassembly, insert the clips on the left hand edge then snap all te others home by applying firm pressure along the other edges of the cover.
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Tool used on this step:Tweezers$4.99
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Locate the CMOS battery
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Gently disengage its connector.
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To reassemble your device, follow these instructions in reverse order.
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