Touchscreen Test
Drag your finger across every square. Any that refuses to light up is a dead spot. There is also a multi-touch counter and a drawing area for checking that your screen tracks smoothly.
Coverage grid
0 of 140
Sweep slowly, right into the corners and edges — that is where faults usually are.
Drawing area
Draw slow circles and straight lines. Each finger gets its own colour, so a line that suddenly changes colour means the screen lost track of your touch.