Green light goes on but nintendo ds lite does not boot.

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!

Hi, so if you try switching on the ds lite, nothing at all happens ??
Does the green light flash even if it is for like a split second.If it does then it is more likely top be a blown fuse. If 1 of your screens flicker also, this could be your problem as the ds will not start up with a broken screen. Please advise

moister damage or bad board look for dark or burn spots on the board

Hi,

If the green light is turning on and the screens are staying blank it is a problem with he L2 fuse on the motherboard (located just below the power button).

This can be replaced if you are handy with a soldering iron. If not drop it to a local repair shop it can be fixed for about €20.

you should send it to get fixed

Check L2 near the power switch on your DS mobo. That part usually get loosen or taken out when you drop your DS. And usually you can recover it when dismantling your DS.

Sorry, but this could get complicated. Somehow the cable inside the DS that links the LCD screen with the motherboard has been disconnected.  This happened with me.  You could buy a new LCD      screen, (because there is a possibility that yours is cracked), but after you do this, you have to take the DS apart and install it.  If I were you, I would buy a whole new DS (this is what I did). Sorry!
Hope this helps!

get a new battery

Hi. this issue is normaly caused by bad screen (normaly top screen) or bad assembly in one of two screens, re insert carefully the flex cable again, if your screens are fine this must fix the issue

Ditto... except my daughter is 10. Both screens remain black, are fully charged and green light stays on for more than 4 minutes.