Try removing all the batteries including the backup battery and leave it sitting for about half an hour.
What XiiR3CR34T10N said. That does look cool! If you can get it to stay that way, you should sell it on eBay for a lot of money and buy a new one!
I indeed think that one of the LCD flags got corrupted. I have no clue how you'd reset them tho.
remove all power and wait. then wait longer. maybe sleep a night before powering back up. The problem is very likely to go away.I would also do this. I think 9 hours is how long I have heard for the RAM to be completely erased using this method, but if you have the backup battery in, it won't work (since it is used to supply the power needed to keep the RAM from clearing).
However I doubt it. This looks more like a made up story to the results of messing with display instructions to me.I doubt that anyone would make up any stories after messing with display instructions.... I'd reckon I would just tell what happened, also makes fixing problems easier :)