I received my A600GS order today and have encountered the same problem.
Here is my full experience with it:
After connecting it up, I attempted to power it on, which took 2-3 tries, but after figuring out exactly how that works, got it going.
I went through the first time setup guide, configured my wireless, selected a generic 105 key keyboard (I didn't have one connected at the time, but hope to use a Bluetooth keyboard at a later date) and finished the configuration.
After this it went straight to the apps/games browser. I selected Super Skidmarks with the mouse, upon which the system appeared to have locked up - the mouse pointer could still be moved around, but none of the on screen buttons worked (add, edit, start etc) and I could not select a different application.
I pressed the button on the power lead to switch the unit off, which was a full power cycle as just pressing the button on the power lead would not turn it back on unless I disconnected the power first, but upon restarting, the only thing I get on all subsequent reboots is a red mouse pointer on a blank screen.
I tried it on my Samsung TV and also tested it on my PC monitor, an ASUS VS247H, and it does exactly the same thing, mouse pointer on a blank screen.
What’s going on? How do I fix this and get it working?