Yes I have read mostly everything on this site. I was merely suggesting that you may find a clue as to the problem by looking through the guides.
I am not understanding which things are you referring to? Resetting the display resolution on the Android device, and/or restarting the client?
If you changed the layout completely and assigned the new layout via the CMS to the display, and then restarted the client, the client should then download the new changes. It may take sometime depending on how large and what content is to be displayed. There can be some problems updating content if the layouts display time is short and the size of the content is large. If this does not appear to be the problem you may also want to look at this