Improve the FAQ with the RGBWW WLED experiences of a first time user being unable to set the leds to a solid color

FAQ.md

@@ -26,6 +26,7 @@ This page will continually get updated with questions often asked.
 
 - [My LEDs don't turn on at all.](FAQ#my-leds-dont-turn-on-at-all)
 - [My LEDs don't get as bright as they should!](FAQ#my-leds-dont-get-as-bright-as-they-should)
+- [My LEDs are unable to be set into an consistent solid color.] (FAQ#my-leds-are-unable-to-be-set-into-an-consistent-solid-color)
 - [When I select green, the LEDs turn red!](FAQ#when-i-select-green-the-leds-turn-red)
 - [My LEDs act funny and flicker randomly.](FAQ#my-leds-act-funny-and-flicker-randomly)
 - [Not all my LEDs turn on.](FAQ#not-all-my-leds-turn-on)
@@ -133,6 +134,11 @@ If the brightness slider in the UI is already at maximum, try checking the auto
 Set the milliamp limit to slightly below the rating of your power supply.
 If the LEDs are still too dim or change color towards the end of the strip, there may be a significant voltage drop. Try injecting 5v power at the end or middle of the strip with some appropriate cabling.
 
+### My LEDs are unable to be set into an consistent solid color.
+
+If the LEDs should be individually addressable, like the SK6812, but instead they only behave as either RED,GREEN OR BlUE pixels (in a row).
+You might not have enabled (settings -> led preferences) "LEDs are 4-channel type (RGBW)"  for an RGBW/RGBWW/RGBNW strip.
+This behaviour is accompanied by WLED being unable to address all LEDs, if you specify the exact amount of LEDs in the strip.
 
 ### When I select green, the LEDs turn red!