A while ago while figuring out I2C difficulties of my own I did some research and listed out all the failure modes and test techniques I could think of regarding I2C. See I2C protocol doesn't work properly. I routinely go through the list now to tick off the things I need to check to get a new I2C connection working, usually it's something simple (fingers crossed). Do you have access to an oscilloscpe?

(Edit) This old post seems to describe a similar problem (only getting zeros) MPU6050 doesn't work. The consensus there was that the 3.3V MPU6050 had been connected to a 5V UNO, frying the MPU6050 chip.

A while ago while figuring out I2C difficulties of my own I did some research and listed out all the failure modes and test techniques I could think of regarding I2C. See I2C protocol doesn't work properly. I routinely go through the list now to tick off the things I need to check to get a new I2C connection working, usually it's something simple (fingers crossed). Do you have access to an oscilloscpe?

(Edit) This old post seems to describe a similar problem (only getting zeros) MPU6050 doesn't work. The consensus there was that the 3.3V MPU6050 had been connected to a 5V UNO, frying the MPU6050 chip. That sounds very like your situation.

A while ago while figuring out I2C difficulties of my own I did some research and listed out all the failure modes and test techniques I could think of regarding I2C. See I2C protocol doesn't work properly. I routinely go through the list now to tick off the things I need to check to get a new I2C connection working, usually it's something simple (fingers crossed). Do you have access to an oscilloscpe?

A while ago while figuring out I2C difficulties of my own I did some research and listed out all the failure modes and test techniques I could think of regarding I2C. See I2C protocol doesn't work properly. I routinely go through the list now to tick off the things I need to check to get a new I2C connection working, usually it's something simple (fingers crossed). Do you have access to an oscilloscpe?

(Edit) This old post seems to describe a similar problem (only getting zeros) MPU6050 doesn't work. The consensus there was that the 3.3V MPU6050 had been connected to a 5V UNO, frying the MPU6050 chip.