Flickering pixels

[lockey04@outlook.com]

Hi all I'm using the ethernet pixel controller, I have 100 pixels in port 1, 800 in port 2 and 800 in port 3.  I have a separate power supply for ports 2 and 3.  My problem is with port 2, I have 8 strings of 100 for a half megga tree (port 3 is another 8 strings), I seem to have random flickering lights for the first 2 - 3 hundred pixels, where the other ports on have one flickering pixel, I thought it must be a bad connection or cross wire.  I split down to one sting of 50 and all 50 flicker, so it is either coming for the Ethernet board or the first string is faulty. Any other ideas?