I recently found my original ds again and started playing it but i have discovered a problem. It is fine when i first turn it on but slowly while playing for a long time the top screen slowly starts fading until it is hardly visible. The amount of time it takes to do this is about the equivalent of a race in Mario kart, so about three minutes. After this the screen goes into negative colours. Reseting the ds puts the screen back to normal but then the problem continues again. It seems as if the screen is not getting enough current. I've looked on google but to no avail. Does anyone know why this is happening and how to fix it?