some video don't run
I'm using britghsing 810 with elotouch monitor to play several videos. Brightsign monitor is connect to the monitor with DVI HDMI cable. When I'm using a long cable (4m) all the video play but the quality is not good. When i'm using a short cable (1 m) the quality is good, but some video don't play (dark screen and brightsign return to home page All the video have the same mpeg compression (with compressor) 15 mb Any help 1