Hacking DSL not working but showing green light

[mrmilkman]

Hi all, I've tried a search but it was coming back with error msgs, and all I could find eventually was about bridging the two fuses. I think this problem is related to the screens? Is this right? I've read that if one of the screens aren't connected properly, or working then the DS wont work, but the green light will still come on? If this is so, how do I tell which screen is broken? Or do I need to replace both screens?
Thanks

 

[Kittymat]

If the green light comes on for a couple of seconds then one screen flashes and then the DS goes off - it is a fault with the screen that did not flash.

If the green light stays on then it can only be either the WiFi board (small push in board next to the card slot) if this is faulty or missing it gives this fault. If it is not the WiFi board then it is the main logic board.