Is there a way to reboot the host computer when it hangs at initializing display parameters?

I have three computers at home that are giving me that message and I cannot connect.  I can use the remote file manger so its only the remote display that is broken again.   Is there a way to reboot them thru TV?    I am running 13.2 on the hosts and laptop to connect to them.   I am traveling in the desert and really need to connect to at least one of them.   Thanks for any help I can use to get them rebooted while I am still on the road. 

 

Thanks, Bill