My Optiplex 755 will not go beyond the BIOS loading stage. It says Press F1 to continue, F2 for Setup and F5 for system diagnostics. None of these 3 options work and then when I press any of the option keys a beep sound is heard.
THe exact message is "System Battery Voltage is low. Press F1 to continue, F2 for Setup, and F5 for System Diagnostics." This problem did not occur earlier only now its not going forward.