If you see a red CPU light on the Motherboard with no display, you will have to take a look at the BIOS, CMOS, etc. Full details here.

Microsoft has taken a novel approach to ensuring users see the hated Blue Screen of Death less often: it has created a red version for Longhorn to indicate more serious problems ...

REDMAGIC's new gaming monitor offers 4K 160Hz high-end specs with Mini-LED panel featuring 5088 light zones and up to 2200 nits of peak brightness.