Hello I have the motherboard from an "HP All-in-One - 22-b000nv". I remove the motherboard from the HP PC case in order to put the motherboard in a case that I designed. The power LED blinking 7 times
repetitevely with a small pause. The HDD (is NEW - empty/formated) motor don't start to roll at all and the HDMI out is dead. Original the PC had a screen which connected at the motherboard directly which is the only that is not connected.