Looks like I found a fix.
The media client auto detected that my TV was 1080P and set the output resolution to 1080P60. However, it appear that in doing so, it was also trying to push that resolution to the component output interface, which the Slingbox can't handle, (Slingbox only does 1080i or 720P for HD).
Anyway, I went into the diagnostic menu on the media client and set the resolution to 720P and the Slingbox started displaying video immediately.
To get to the diagnostics menu, hold the green key "D" for 5 seconds. I had to do it twice. Scroll to user settings. Turn on Slingbox on your phone or tablet, when you see the menu, turn the TV off. The setting may auto switch when you do this to 1080P from whatever your TV setting was. Use left/right to select 720P and hit enter. Select exit and you should have the sling box working with your TV off now.
We just upgraded our TV to FIOS Quantum TV, which required us to replace our Set Top boxes (which worked fine with our Slingbox) with a single Media Server and 2 Media Clients. We've connected the Slingbox to one of the Media Clients, as we don't want to interrupt the primary TV in the house when someone is using the Slingbox. The problem is that when connecting to the slingbox via App to watch something, we get an error after connecting "Weak or no video signal detected". The remote works fine, but just a blue screen with this message.
Is there any way to get the Slingbox to work with the Media Client? They are an Arris IPC1100 P2 device.
Thanks for any help.