I've had the "cutting off after 10 minutes" problem and that usually turns out to be the bulb. We replaced the bulb and it was ok.
As for the first problem I'm not sure exactly what you mean by "no usb plugged in will show green power button then when pressed shows a flashing red light, nothing displays" although have you tried completely uninstalling the software from the computer than reinstalling it. You might also have to run a registry cleaner before reinstalling. Also reboot the PC in between uninstalling and reininstalling.
Hope that helps