Removing GNU GRUB DELAY *Debain based linuxes

To open GRUB configurtion for vi:

sudo vi /etc/default/grub

For nano:

sudo nano /etc/default/grub

Find The Line that says Grub_Timeout=

Set Grub_Timeout=0 or your desired number

Type esc then type :wq, in nano do ctrl X

Reboot your system to see the changes take effect.

If something does not work, you can troubleshoot by checking the connections, ensuring that all components are functioning properly, and consulting the user manual. If the problem persists, consider seeking professional assistance or contacting customer support (for your linux) for further guidance.