Second monitor not detected by Device Manager (HDMI)

[alexchen12345678987654321]

Last night my second monitor was working fine, but this morning I powered on my computer and the second monitor is showing no signal

 

[alexchen12345678987654321]

More Info:

Switched my two monitors' HDMI cables and now the second monitor is working and the first one isn't so it seems to be a problem with the HDMI port of my motherboard?

 

[geofelt]

That would argue with a problem with one cable.

 

[alexchen12345678987654321]

[Resolved] Motherboard had integrated graphics on auto instead of enabled in the BIOS