More problems

[Maureen L Thomas]

OK so now I am totally confused.  I installed debian 8.5 and used the 
following partitions:  /  /boot  /home  /usr  /usr/local/ /var   /opt  
and   /srv
It starts to boot up and goes through all of the normal boot processes 
and then stales just before the final screen to sign on. All I get is 
the - flashing in the upper left hand corner.  The only message I get is 
i8042 controller not found.  This is a brand new machine and I am using 
an old HP monitor that I had to put an adapter on from DVI to hdmi.  I 
have used the legacy boot from the bios.  Should I change the bios back 
to UEFI and re-install?