Gaming Help, my DSi camera won't work

[nextnomura]

at first, i dont know where to put this question, so i decided to put it here, my question is not related to any flashcart or other hack device.
FYI i bought the DSi in australia 6 months ago and i live in indonesia, i never used any flashcart on my DSi. there is no official nintendo office here in indonesia, so i can't really use my 1 year warranty and also i can't find any local game store that can help me to repair this problem, they said that i need to bring my DSi to another city so they can repair it.
and now, i don't know why, the camera is not working. everytime i press the camera button (L&R at the DSi menu) or use any camera related software (like warioware snapped or my sims camera), it always get me into a black screen says "An Error Occurred. Press and hold POWER to turn the system off." i don't know what happen to the DSi, my little sister that usually use the DSi. i tried to format and update the firmware but it doesn't fix the problem.

is anyone can help me? what can i do to repair it?
or i need to bring it to the another city that peoples tells me?

thanks in advance. sorry for my bad english.

 

[adamshinoda]

Maybe the cable is loose

 

[Cuelhu]

how old is your sister? Maybe it broke because of misuse.

 

[hunter291]

You may use the wrong way, ask the other person face to face it!

wtf are you talking about ? oO

 

[nextnomura]

thanks for the reply guys.

@Cuelhu
she's about 17 years old, but she's a really careless person. i dont know if she dropped the DSi.

so is there anything i can do to fix this?
or i need to disassemble the DSi?