Epson 1080p HDMI problem

Hi,
I have a problem I am hoping someone can help me with.

I have the following equipment...

Denon 3806
Sony PS3
Scientific Antlanta 8240HDC cable box
Epson 1080p
Samsumg 32" flat panel
XBox 360 (normally not in system but tried)
Monoprice MPSP08
Monoprice HDMI extender (cat6 15')

When I originally bought everything it worked fine through the HDMI but when I moved to the new place the only way the HDMI input works on the Epson is with my HTPC.

I have tried the following...

Hooking up the PS3 and 8240HDC via component to the 3806 and letting it upconvert to HDMI= excellent picture via the Samsung, blank screen via Epson
Hooking up component straight to Epson= poor picture quality
Hooking up the PS3 straight to Samsung=excellent picture
Hooking up PS3 straight to the Epson with the same cable= blank screen
Hooking up 8240HDC straight to Samsung=excellent picture
Hooking up 8240HDC straight to Epson=blank screen
Hooking up XBox 360 direct to Epson=excellent picture
I have tried putting a switcher Monoprice MPSP08=Excellent picture from any source to Samsung (Xbox not tried) but only blank screen to Epson from all sources except PC (Xbox not tried)


Suggestions?

I replaced all my cables with Monoprice Redmere cables and I got a new Denon 4520... The first time I fired it up everything worked. When I switched back to the input I started with no pic. I then switched to my other inputs and I lost them all. I also picked up a Monoprice HDMI amplifier and tried the whole setup again... Same scenario, everything worked until you switched away from a input and then switched back to it. I am thinking there is something wrong with the Epson projector. If I have the Samsung TV hooked up I never see the problem. I just can't afford to replace the projector at this time. :-(