Denon AVR 1513 issues.

[blackwidowavenger1964]

I have a Denon AVR 1513 and recently lost all video to the receiver. The audio works fine. I have boston acoustic speakers set up to the receiver along with an optical audio out cable and HDMI cables correctly set up. I tried resetting it and other various things and no luck. I am planning on contacting Denon tomorrow to see if they have any suggestions but I really would like to know if anyone here does. I have had the model for about three years now maybe four. I have an INSIGNIA 3D blu ray player one of the nicer first models and I also have xFinity from Comcast that I want to use with the receiver. If you guys can not find any solutions, are there any good ones on accessories for less that will work with my boston acoustics speakers/subwoofer 5.1 surround sound channel, really good audio output with 3d capability even though I don't really use it, I have the 3d blu ray player just incase? I am very unexperienced in home theater set up and do not want to make another mistake if I did infact buy one that was not going to last that long. Thanks in advance.