Trying to use an AND771GST display with Arduino uno

I'm a little new at this so please be patient.

I'm trying to connect AN AND771GST 24x2 character LCD display to Arduino Uno. I'm pretty confident I have everything wired correctly, but only get a series of dark blocks across the first row
of characters.

I initially tried the hello world example from the LCD libraries, but have since moved on to other sketches from other sites. Various permutations cause the patterns of dark blocks to change but no usable characters.

Any thoughts?

Do you have a link to the datasheet of the display?


please post it?