Chosen Solution
I have a DS lite that I replaced the upper LCD on. It turned on fine once i had the shell back together, and the start up screen loaded, but when i touch the bottom screen at any point the whole unit shuts down. If i dont touch the digitizer it will remain on and power on/off normally. The only problem occurs when you touch the digitizer. I was kind of at a loss as to what to do so i checked/cleaned ribbon cables, replaced the Fuses and even the L2 inductor, but still have the same problem. I have all the parts and tools required to do repairs, but I’m new to DS’s and cant find anything on this. Anyone have any recomendations?
I believe it has something to do with the metal on the back of the LCD making contact with the components underneath (so not the touchscreen as such) there is a black plastic liner around the screen that prevents this from happening. Just check it is still in place. see this answer
