seeedstudio tft touch shield blank screen w/ arduino mega2560 after uploading

after I uploading the example of drawing cycle in the "example", the TFT touch shield was blank screen. the Arduino 1.6.5 IDE showed that the file uploading finished. I checked the port, the board in the "tool", they all showed correct I also add the TFT touch shield V2 library into the library. dun know what I missed or which step was incorrect.

Did you convert the display to work on a mega or is the display still stock?

There are pads you need to cut and pads you need to connect. Do a search for "Seeedstudio TFT v2 Mega" you should find an Instructables page that shows you the conversion steps