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When you see the Dell logo during POST, press the F2 key to enter the setup screen. If the issue persists or if the same AC adapter is working fine on another laptop, contact Dell Technical Support to learn more about repair options that are available in your region. Resetting the BIOS to its default settings will make sure the USB ports are enabled in the BIOS. If the AC adapter type is Unknown - Try with another working AC adapter.If the AC adapter type is None - Verify that the AC adapter is connected to the laptop, the LED on the AC adapter is ON, and the correct AC adapter is connected to the laptop.The AC adapter information is most often found on the main screen of the BIOS. Verify the AC adapter type in the BIOS options.When the Dell logo appears, tap the F2 key until the message Entering Setup appears.To verify if the laptop is recognizing the AC adapter correctly: This article contains information regarding the Latitude E6410: Visual Guide to your Computer with chassis images and location of ports. The AC adapter's wattage information is printed on a label on the bottom of the AC adapter. For optimal performance, Dell Technologies recommends using the original AC adapter that came with the Dell laptop. Dell laptops come with a 45 W, 65 W, 90 W, 130 W, 180 W, or 240 W AC adapter. This can depend on the hardware configuration of the laptop.
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The laptop battery might not charge or charge slowly.Įach Dell laptop uses an AC adapter that is of different wattage.The laptop may reduce the processor (CPU) speed to save power.The laptop may show an error message such as "The AC adapter type cannot be determined. This prevents optimal computer performance" or "Unknown or incorrect AC adapter detected.".Using an AC adapter that has a lower wattage may cause one or more of the following issues: