Adjusting Screen brightness

[Colin23erk]

Sorry Folks - I can confuse the best of people .

I will try again

I use Linux-Lite 2.0    I have it installed twice on separate Partitions  alongside the original Win 7  and Dual Boot.

I tried the brightness fix on one (new) install and it did not work
so I tried it on the (old )install and it worked .
But now when I try to boot to the (new) install it will not boot
All I get is " Error file name expected "--

Hope this is clearer .
My immediate problem is to boot to the new install so I can try to see if the fix now works . I expect if I can get a clean install of Grub I will be able to .

Colin