I changed my psu which is 1st player Black Sir PS-500EUW, and after i test it the pc turn on, all the hardware spinning and functioning including my GPU (i see the fan spinning) but the monitor show "no display " message, i try the attach-reattach way but it still show "no display" message, i open my pc and reattach the gpu but this time my pc did not turn on, it shows the sign of no power ( i assumed because my keyboard rgb did not turn on the light effect). I try other power cable, it remain the same. But when i remove the gpu, and connect the hdmi to mobo, it turn on and the monitor show the display. So is it my gpu dead?