I received my Dot3k hat today and, though the backlight and bar graph appear to work fine, the display will not show text. I’ve tried this on an A+, B+ and RPi 2, using kernels 3.18 and 4.1, with and without device tree overlays, with no success.
I used the curl one-liner to install the modules and examples, and when the example scripts are run, everything behaves as expected (apart from text displaying) and there are no error messages given by Python or in syslog. I’ve double-checked in config.txt and confirmed that SPI and i2c are enabled. Some of the soldering on the board seems dull rather than shiny, but everything else appears in good order.
Do you have any suggestions as to how to fix this, or do you think I have a duff one?
Thanks in advance,