4x 7 segment HT16k33 does nothing

I have 4x 7 segment display HT16K33 connected to an Arduino Nano and Mega. The voltage and data lines are good connected. With an I2C scanner I’ve verified the address correctly 0x70. but unfortunately the display does not work when I start the program. what am I doing wrong that it does not work.
Serial 7-Segment Display Example Code
Program: I2C Mode Stopwatch by Jim Lindblom SparkFun Electronics Date: November 27, 2012

S7S_i2cExample.ino (3.7 KB)