theres a stlus socket on the side take it out and touch away or just se your finger
buy a new one
try taking off any screen protectors
buy a new one
The lower screen is a touch sensitive screen.
It's probably broken
No, it's broken. There are some online shops like GameStop and others that will repair the screen for you. Google "Repair DS Lite Touch Screen" for more info.
You can play games on the DS using a stylus and a touch screen
Yes,of course it is a type of DS after all
No its not. The only portable game system that has a touch screen is the Nintendo ds.
The Nintendo DSi, like the two previous incarnations of the DS, has two screens, one a non-touch screen and one touch screen.
It depends. If the touch screen works, but isn't clicking where you want it to, then you need to calibrate it. You can do this on the Settings. If the touchscreen is not responding at all, then sorry, you need a new Nintendo DS.
One is the touch screen.