displayer number not fixed

[sandwitch]

Hi guys,
My Term.1 is PC with DVI link, and Term.2 is TV with HDMI link. The graphic card is AMD R9 270. When the TV is off, the displayer number of PC will be asigned to No.1 by win10. But when the TV is on, display number of PC will be No.2 and TV be No.1. This cause an issue. Since term.2 is not often used, so I turned off auto-run option and set the displayer No.2 to Term.1 and No.1 to Term.2 when the TV is on. But when the TV is off, Term.1 will find no displayer No.2 and fail to boot. So I can not use the PC with the TV off!!! The displayer number is automatically assigned by win10 and can not be changed. The DVI/HDMI link can not be exchanged since TV has only HDMI input. Do you have any solution to have the PC work while the TV off ?