I just bought an EPSON 9400 projector , It is marketed as 6040 Be in USA and other countries. Replacing my 8300. I have Yamaha AV 3700. To it are connected my set top box for TV, Weston media player, Amazon fire stick , Samsung 3d BD E5500 and Oppo 80 BD. \nPrior to to using my Epson 9400 my old projector was giving no problem with any of my devices . But ever since i connected my new projector , i am not getting picture from my oppo and Samsung BD player. I always get the message " Not Supported". with a blank screen.\nSo far my amazon fire stick was working fine but now even that has started giving the same message,\nSo far there has been no problem with my TV signal.\n\nSometimes i do get some pictures on all specially fire stick which may work for half an hour or even more and suddenly blinking of. Some times i get the sound only in fire stick.\ni was told by some forums that my HDMI cable was too long at 25 feet so i changed it to 15 feet , that is all I can reduce but problem persists. A\nI connected my all three non functioning devices directly bypassing the receiver to the projector and i get the picture fine for new cable of 15 feet . But that was not happening earlier for 25 feet cable when i bypassed the receiver. \nMy dealer wants me to buy Costly HDMI cable but the forums advise that at such lengths it is not needed. I use Blu rigger 2.0 cable \nIs it the HDMI port on my Yamaha receiver ? Though I interchanged my ports many times but that doesn't solve the problem. I have 7 output ports on my receiver. \nCould it be some setting on receiver ? though i doubt that because Fire stick was functioning fine so far About couple of months.\nI have tried every forum but no where i have been able to find a solution.\nPlease help.