I have a problem

[Craig Flynn]

My PC was working fine earlier and now that I turn it on, I have no signal to my monitor & the CPU and VGA red led's are lighting up on booting,

Motherboard- Gigabyte Z270x ultra gaming

Graphics Card- Gigabyte NVIDIA GeForce GTX 1080 G1 Gaming

CPU- i7 7700k 4.2 ghz

These (what look like warning lights) are located on the bottom right of the motherboard, there are four in a square

I have tried different HDMI cables and they're fine so I'm puzzled and need advice, thanks!

[triffid]

Did you try the basic troubleshooting - clear CMOS, reposition the GPU in the slot, test the PC with another monitor? Eliminating some possibilities helps to find the cause. Did you move the PC recently? Was there any electrical shock in your house lately?