Question Dell LATITUDE E7440 Cant get to boot menu

Apr 20, 2021
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Does it work at all outside of that? Try resetting the BIOS, unplug the main and CMOS battery, hold in the power button for about 30 seconds, plug things in and see if it works.
How can i reset the BIOS if i cant press F12? It works, but doesn't respond to pressing F12 etc. But i can hear the fans only when i press the turn on button+D, which makes it run some LCD test - the screen goes Red, green, blue, white and black, but still after that cant go to boot menu.
What is CMOS?
 

hang-the-9

Titan
Moderator
How can i reset the BIOS if i cant press F12? It works, but doesn't respond to pressing F12 etc. But i can hear the fans only when i press the turn on button+D, which makes it run some LCD test - the screen goes Red, green, blue, white and black, but still after that cant go to boot menu.
What is CMOS?
You would reset the BIOS by following the other procedure with unplugging the CMOS battery and the main batter. CMOS battery is what keeps the BIOS settings when the system is powered off and if the main battery is removed https://www.lifewire.com/what-is-cmos-2625826#:~:text=CMOS (short for complementary metal,as well as hardware settings.
 
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