I recently got a R4 revolution, and it's worked well for the past 3 months. However, after playing the 15th day in Lock's Quest, the touch screen bugged, and now the DS thinks I am pressing down on the bottom left of the screen. This makes touch screen games unplayable. It also happens when the DS doesn't have the R4 inserted, and reconfiguring it doesn't fix anything, as it won't register me pressing it. Also, there is no food lodged in the DS or anything, the touch screen is clear. Does anyone know how to fix this issue, or is it a fatal DS bricking flaw of the R4?