when installing kali linux i messed something around with my bios setting and after my failed attempt to install kali linux on my device i went back into the bios settings and reset the setting to factory defaults since then my laptop has been restartin continuoisly within five seconds..Even the dell logo does not show up and the f12 key also doesnot work..i also tried pressing the fn key and it doesnot seem to work too.. Please help me with this issue.thank you for all your suggestions.