Problem with 8x8 Matrix and Parola, nothing displaying...

Looks pretty much like my eBay ones. Wiring on UNO is:

Pin 13 --> CLK
Pin 11 --> DIN (not DOUT)
Pin 10 --> CS

Modules are wired from right to left (facing them). So the first module connected to the Arduino is extreme right, then you jumper to the left each time you add a new one.

With the 7219 chip at the top as shown in my photo, look at the matrix. Facing it. On the left hand side of the matrix should be the part number (something like FJS1088AH). You can see that number if you look between my two modules. I've seen them installed backwards from eBay a few times.

You don't have any other SPI devices attached at the same time do you? Like an ethernet shield or something? Attach a photo of your Arduino and modules.

As a last resort, you can ask Macro since he's the one who wrote the Parola library.

Mel