Out or range error

Ok, sorry for delay... went away for a few days..

Long shot, but worked with completely black screen on Mrs Zimmer's Biostar trying to boot Mint XCFE.

Boot the system, then:
Edit the etc/default/grub file.. you will need to do this as root.(you might want to save a copy first).
Un comment the following line..
#GRUB_GFXMODE=640x480

but also give it a new resolution. 800x600 maybe (I used 1024x768 as that was the res of her monitor but the GRUB text comes out a bit small..)
eg.
GRUB_GFXMODE=800x600
Save the file.
In a terminal run sudo update-grub
Then restart and see if that stops the 'Out of Range' message.

If that does not work you can go back and comment out the line again with a #