I have attempted to fix my DS myself , but i found a very useful electronic store located in cabramatta Sydney , they fixed my DS and also gave excellent customers services , you can find them at www.pro-x.com.au ...
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Get a new one.
well you can look it up online if not then sorry but your dsi is destroyed
if you mail it back to the Nintendo company, they'll fix it for free once
Yeah and then the person will fix it
yes
Take it to your local electronics store.
try to blow in the DSi around the butten, for this use pressed air NOT your mouth.
Shut it off, then turn it back on.
Well basically you can't get rid of the update you have to return it for a new dsi that has not been updated
hump it and get knocked up and have a dsiby
Sorry but this is my best answer: go to a computer repair place and see if they can fix it.