Sharp UP-3500 series POS Terminal

This POS terminal was surplus from a community college.  This powers on, goes through the calibration and gets the screens shown but I haven't been able to test it beyond that.  The display isn't very bright.  I would think that there is as way to adjust the brightness but I haven't been able to figure anything out.  This comes with a power supply but no other accessories are included.  


C9-3
fdk 81229228