On Win10 my big screen TV is connected via HDMI. It works ok as primary monitor, but will not work as secondary. It hangs for

[eyezaknewton]

HDMI secy monitor on win 10

 

[eyezaknewton]

after fitting the gt710 graphics card, it took three days and many many restarts and hours of waiting before win10 finally
gave anything other than 'no signal' on the big screen. I thought it might be hardware, but it was win10