On my really old 2011 Shamrock, the Concertone ZX-75, the model installed in it, only allows SD cards up to 2 GB to be read. All my SD cards are 4, 8 or 16GB...
If you're hard set on looking at pics on your TV, your best bet: connect the camera to an available port on your television: either composite (yellow video cable, with red & white for audio, ships with camera) not the best quality or invest in an HDMI cable if yours support it ($20 or so).
I my case, I transfer them to my iPad and watch the pics on it.
Denis & Diane
2010 Sabre 31REDS
Ford F-250 2011
* Happy Campers *