#PC Won't POST while Connected to TV

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brazen fractal
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So whenever I try and boot my system with my Old TV connected it won't even POST. If I boot the system with just a monitor its fine and I can connect the TV later which is fine.

CPU : AMD 3900x
MOBO : B450M DS3H WIFI
GPU : Arc 380
TV : Some old ChangHong 1080p yoke