Green light, black screens, no sound, needs new battery???

It sounds like the battery is dead. You can order a replacement battery direct from Nintendo at http://store.nintendo.com/webapp/wcs/stores/servlet/ProductDisplay?productId=108205

Sounds like you need to send it in for repair. I had sent my console to VideoGame911.com and they repaired mine at a great cost and got it back at the end of the week. Give them a try, they are cheaper than a manufacturer. Good luck!

could be a loose ribbon.

possibly fuses have blown on the logic board, but it sounds like it needs a new one board.

possibly, the battery went bad after overcharging...but is that supposed to be charging automatically? have the battery checked

It might be broken on the inside if they don't give you a warranty to fix it will cost 75$ without the charges for shipping and handling and the regular ds lite costs 129.99 so you should probably get a new one.

there isnt a reset button. have you any power lights or screen flashes.

try charging it, or if that doesnt work,the battery might be in incorrectly, or one of the battery pins is broken or bent.if the battery is in incorrectly try putting it in again.if one of the pins is bent try carefully bending it back.if one is bro0ken,you might consider a new DS.there could also be forien material in thew battery compartment, in which case you would extract.if none of these solutions work,it might either be the battery(in which case you would buy a new one)or an intenal problem (which would lead me to consider a new DS)

Is there a slight or faint image still in the background?

things like that happen if you drop it,have you dropped it before?