Introdução
In this guide, you will be learning how to replace the CMOS Battery in a Dell Latitude 7400. The CMOS battery powers the motherboard's Real-Time-Clock (RTC) and the CMOS chip. This stores the system's date and time information when the computer is powered off. If your computer starts to display the incorrect date/time, or if custom settings in your BIOS are lost when you turn it off, it may be time to replace the CMOS Battery. This guide will walk you through step by step on replacing this battery.
Ferramentas
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Lay the laptop on a flat hard surface facing downward.
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Use a Phillips #0 screwdriver to remove the eight 3 mm screws that secure the lower case.
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Lift the lower case off and set that aside.
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Use a Phillips #0 screwdriver to loosen the two 3 mm captive screws that secure the battery.
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Gently grip the battery connector loop and lift it to disconnect the battery connector.
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Lift the battery up and out.
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Lift the black locking flap that secures the I/O board ribbon cable.
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Disconnect the ribbon cable.
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To reassemble your device, follow the above steps 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.
