Ds is fully charged and won't come on.

Hi there. Yes it does. It is basically an indicator to tell when your DS has fully charged so that you do not waste any unnecessary electricity.

Please rate and comment, thank you.

Hello there, the Nintendo DS Lite has four levels of brightness. The battery will last 15-19 hours on the lowest settings, and 5-8 hours on the brightest.This can also vary depending on the type of game activity."
So the DS should last the whole time in even on the highest brightness settings, if fully charged. Nintendo states that it takes 3 hours to fully charge the DS. 

hope this helped, also this site will also help you to get your ds battery to last for longer 

 http://www.ehow.com/how_2015000_extend-b…

good luck

We had this problem with a brand new DS Lite...turns out it was a bad charger. If you have access to another charger, try that first. Good luck!

you could have blown the fuse in the ds. especially if you,ve been using the soft reset function to get back to the game menu

How can you tell if it's fully charged if it wont turn on? If your answer is that the light wont come on try to charge it, you're a few IQ points below average.

It's likely that the screen is either dead, or the battery is dead. Not just drained, the batteries inside the DS can die after awhile. There are plenty of sites that sell replacement batteries, use google to find them

try cleaning the battery where it connects into the ds with rubbing alcohol with a qtip

i guess you will have to buy a new one cause i will not know

your battery...you need a new battery..

I would try and get a new DS if I was u

You never want to play the DS while it's charging, if constsntly persisted it can cause a form of battery leak.

IMPORTANT: Don't charge the DS until it dies on you completely!

When charging the DS the system will display a red light to show it's at its lowest energy, the time it takes to fully charge a DS can take up to 2-3 hours. In the second hour of charging the light will appear green but you don't want to disturb it until the light goes off. ( showing it's energy is full )