Введение
Use this guide to replace the CMOS battery in your Dell Latitude 7490 laptop.
If your laptop shows a BIOS configuration screen every time it's powered on, the CMOS battery may have died. Replace the CMOS battery to retain certain boot settings on your laptop.
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Unplug all cables and fully shut down your laptop.
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Flip your laptop over so the rubber feet strips are facing up.
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Use a Phillips screwdriver to fully loosen the eight captive screws securing the back cover.
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Insert the long side of an opening pick between the top right corner of the back cover and frame.
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Pry the back cover up to release the clips securing the top right corner.
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Slide the opening pick down the right edge and around the bottom right corner to release the clips.
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Slide the opening pick along the front edge and up to the top left corner to release the remaining clips securing the back cover.
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Grip the plastic tab on the battery connector and pull straight up to disconnect it.
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Use clean fingernails to pull the CMOS battery connector out of its socket on the motherboard's bottom left corner.
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Insert an opening pick between the left edge of the CMOS battery and the frame.
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Use your pick to pry up the CMOS battery and separate the adhesive securing it.
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Инструмент, используемый на этом этапе:Tesa 61395 Tape$5.99
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Remove the CMOS battery, using your fingers to guide its wires out from under the speaker wires.
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Reconnect the CMOS battery.
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Apply double-sided tape such as Tesa Tape to the battery and press it into place on the frame.
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To reassemble your device, follow these instructions in reverse order.
Take your e-waste to an R2 or e-Stewards certified recycler.
Repair didn’t go as planned? Try some basic troubleshooting, or ask our Answers community for help.
To reassemble your device, follow these instructions in reverse order.
Take your e-waste to an R2 or e-Stewards certified recycler.
Repair didn’t go as planned? Try some basic troubleshooting, or ask our Answers community for help.