I am curious on what the 7970 does during boot. Is there any kind of warm up process for the thing? I plug it in and the mute speaker buttons flash, then each of the line keys flash, then the touchscreen button comes on for a few seconds then goes out.
But the touch screen itself doesn't appear to be on. I'm not sure if I need to flash the firmware to get it to work properly, if so.. how am I able to tell it to point to the TFTP server without being able to see anything on the screen. If this helps when I quickly press the touchscreen button nothing happens. If I hold it for a second or so it begins to flash rapidly.
For some reason I feel like it might just be something that I'm doing wrong. The unit does appear to be operating as it should. I'm using it as a passthrough to my PC right now and its working fine.
I don't have any experience with the 7970 but I'm a little worried now that I just got a bad unit. Think this is the case? Hopefully you guys have some nice troubleshooting tips.