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Repair information and troubleshooting for the Dell Latitude E7240. This is a 12.5 inch computer with a 4th generation Intel processor, introduced in 2014.

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Says that windows failed to start, freezes when loading drivers.

Says that windows failed to start, freezes when loading drivers. Also says clock isnt set right and anything i try plugging in fails to load. Ive updated bios to ?29? Still same thing. Diagnostics says hdd is bad but i have a ssd in there that im told should work

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Sounds like the CMOS battery is dead.
This page refers to your laptop specifically: Dell Latitude E7240 Ultrabook CMOS Replacement
But this one is far better and should give you what you need: Dell Latitude 7490 CMOS Battery Replacement

Dell guidance here: https://www.dell.com/support/kbdoc/en-us...

Best of luck

Dell Latitude E7240 Ultrabook CMOS Image

Guide

Dell Latitude E7240 Ultrabook CMOS Replacement

Difficulty:

Moderate
Dell Latitude 7490 CMOS Battery Image

Guide

Dell Latitude 7490 CMOS Battery Replacement

Difficulty:

Moderate

—

15 - 25 minutes

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