OK got it I'll try and post it here but I'm working crippled as I'm away from home using my stupid little XP netbook which doesn't have passwords for half my stuff so I have to hack my Imgur account somehow. 
Well track 2 is definatly looking weird as a solid colour which if it's a wave form would play back a white noise or something real bad.. Did you solo the track? 
 
But Track 4 is a mystery as that's a midi track?? I'm not sure that is possible for a midi track to show a solid colour. 

OK lets take a different approch. I can't see this in the picture so
WHat audio interface are you using and what driver mode? 
I just found an old thread with the same topic and the pesron had the
driver settings wrong. Have no clue why that made a differance but the OP marked it solved. 
 
http://forum.cakewalk.com/Solved-Problem-setting-up-Tascam-US4x4-with-Sonar-X3-Studio-m3174507.aspx
 
 
I also found this which looks promising. 
 
 https://www.cakewalk.com/Documentation?product=SONAR%20X3&language=3&help=Troubleshooting.16.html
 

I had no idea that MIDI tracks weren't supposed to be solid. I can switch the display to notes and see the events that way, but for clips this is what it has always shown.
 
I've used various audio interfaces, but at the moment I use a Yeti mic and a little Behringer USB input. My driver is ASIO4ALL; I'll play with the settings and check out those threads, and then I'll report on the results.

PROBLEM SOLVED
Well there you go, you solved your problem without realizing it. The minute you said your midi always shows as solid unless you change the view a lightbulb turned on. So that's all that was wrong. you somehow changed your view from the default. Just make sure the "DIsplay clip contents" is checked. By default I guess it's always on because until you mentioned this I didn't even know that box existed.. I unchecked it and my track view went all solid like yours. 
 

Here's with the box unchecked. This is X1 but I think all is the same still. I forgot I still had X1 on my netbook. I'm 300 miles away from my DAW. 

 

Fantastic! That's it. Much obliged.

If you have a minute mark this thread solved and it will help others with this problem in the future. Glad it works, and as always, I learned something new about Sonars menu's
I can see you might use that feature when recording live to lower CPU graphic usage. Otherwise I doubt anybody ever turns that off.