Hello, my slingbox 500 is connected to my comcast xfinity cable box and also to my tv via hdmi cables. It has worked fine for a couple years. Currently, my slingbox is providing my cable tv content that I can watch anywhere on my ipad or phone, but the slingbox is not providing a signal to my tv that I can watch at home on my tv. I have swapped out hdmi cables, unplugged the tv, cable box and slingbox to reset them, but I cannot find the problem. The cable box does also provide my cable tv content directly to my tv if I use an hdmi cable straight from the cable box to the tv, bypassing the slingbox. Has my slingbox hdmi output to the tv gone bad? Thanks for any insight you can provide.