My problems is that I have 3 main projector for projection on building and two small projectors for projection on site screen. But two much override of display of site screen on building by show in the form of line.

2nd some time HDMI cables 20M attach with small projectors display not appear on them. can you aware me what the reason why HDMI cable 20M create such a problem and after 4 or 5 show change to new HDMI cable.

Please consider and reply on email address musa_khan@yahoo.com