Error code on the wii U game pad when you try to run games that utilize the NFC chip. This code will appear if the chip is defective or disconnected. This video will show you how to reconnect your chip.
Link for the screw bit set:
http://www.amazon.com/Neiko-100-Piece-Security-Bits-Storage/dp/B000O5XDOG/ref=sr_1_7?ie=UTF8&qid=1458374358&sr=8-7&keywords=triangle+head+screwdriver+set