Computer won't boot if an old analog tv is connected and turned on

[Idontworkfornsa]

This is a weird issue. I added recently an old analog tv which has VGA output as a third monitor. I used a vga to DVI-I adapter. the other two display is a BenQ connected via DVI-D cable. and digital TV bravia through HDMI. those two always worked fine no problem.

but when the analog TV is turned on and I boot the computer, it doesn't even reach the beep. it just stays there for a while. if I cut the power to the TV reset, then it works. after boot I turn on the power. no issue.

GTX-970, GA-z87x-d3h, i5-4960k

 

[Inachu]

Possibly signal is now sent to card to wake card up but now using too much power preventing pc to turn on.

Try a more powerful psu.