My friends DS Lite is kinds weird as when he try to turn it on just bottom or both screens will flash then shut down. Some time he could make it turn on to the main bit and load the game if hes really lucky but eventually it will just turn off.
He said the cause could have been when he dropped it at school.
There no visual damage to it like dents so I guessed there something messed up with the motherboard or something broken.
Ill try open it up and get an picture of it, if that help.
Thanks