Good morning, I think I have the same problem.
It rarely happens that the display goes off and turzx gives me failed connection. Rebooting the computer I find the display on as in the picture and turzx fails to recognize the device giving me connection failed. The only ways to fix this is to turn off the computer, disconnect the power and reconnect everything, otherwise disconnect the 9 pin cable and reconnect it to the motherboard.
I have always connected the 8.8 monitor via 9-pin cable and used a default theme.
I hope I can help solve the problem, because it is quite annoying. Thanks for the support! :