Question New build, need help

Mar 27, 2019
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Newbie here. I've recently purchased and put together a new pc. I can't get anything to display on my monitor. I've tried new cables and new monitor, reseated parts, tried using 1 ram in various slots, with and without graphics card, plugged into onboard hdmi (motherboard and graphics only have hdmi slots), only have power and monitor plugged in. No error beeps and the led on the motherboard is either Ab or A6.

Z390 ultra btw

Thanks for any help