The nikkei 19 inches monitor has a resolution of 1440×900. Raspbian was not able to recognize the right resolution for the monitor so I had to tune the values into the config.txt file.
After a couple of hours I reached the goal.
I had to force the resolution using framebuffer width and height, then I disabled the overscan and tuned the top and bottom.
In the following few lines you’ll find the changes I did inside the /boot/config.txt file. Before apply any changes to this file, please remember to make a copy of it so you can restore your previous settings.
Please let me know if this configuration works also with different 19 inches monitors.