I have a GIGABYTE AMD Radeon R9 290X OC 4GB GDDR5 (model: GA-R929XOC)

All the latest drivers were installed a week ago.  The display was working except for that it would crash to a black screen about every other day. A hard reboot would get things going again. Then a couple days ago the computer froze to the desktop screen.  I hard rebooted and then no screen came back. It was just a black screen with no boot screen or desktop. I could hear windows loading and could connect with a remote connection to see a black desktop with white cursor. I put in a different gpu and windows and my hard drives loaded again.  I uninstalled the drivers/catalyst and restarted and tried with 290x again and still no difference. I even tried running Display Driver Uninstaller in safe mode with my old gpu and still the 290x boots with a black screen.  I created support tickets a few days ago with AMD and Gigabyte, but have not heard back from either.  Any thoughts on what to try?  Thanks!