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RE: Inspiron 3847 BIOS crashed? USB keyboard is not working

Have you tried a different USB keyboard?  Or tested this one on a different PC?

You can try clearing BIOS, when you have a known working keyboard:

Power off and unplug PC. Press/hold Power button for ~15 sec. Open case and remove motherboard battery. Press/hold power button for ~30 sec. Reinstall the battery. (Is it time for a fresh one?) Close up and connect only mouse, monitor and keyboard. See if it works now.

Check the manual for details about removing/reinstalling the battery:'s manual_en-us.pdf

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   Forum Member since 2004
   I am not a Dell employee

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