Intermittent Static / Garbage External Display On Wake and Boot? Picture included Intermittently (relatively frequent) when the MacBook wakes from sleep and it kicks the external displays on, one or all of them may be fuzzy like this.
I have one display in a Thunderbolt port, and the other one is Apple HDMI adapter in the HDMI port.

I've ruled out the adapters being the problem,
I've done a PRAM reset. (even after it booted from PRAM reset it did it at boot up on login screen)

To fix it, I have to unplug and plug it back in and cross my fingers that it doesn't happen again.

Any ideas?

MacBook Pro (Retina, 15-inch, Late 2013)
2.3 GHz Intel Core i7
8 GB 1600 MHz DDR3
Intel Iris Pro 1536 MB
If you look in the Console log you will find that the WindowServer is having a hard time finding the right protocol for your monitor.

Usually that happens when the hardware (cable/converter) connection are not stable, to long or near interference source.

From your picture it does look like your cable is to long and to close to the external monitor screen, and the Apple adapter is pulling its weight on to the plug.