I2CexpDiag show :
Scanning i2c bus for devices..
i2c device found at address 0x20
Total I2C devices found: 1
Scanning i2c bus for all lcd displays
LCD at address: 0x20 | config: P65401237L | R/W control: Yes
Total LCD devices found: 1
...
Compare error: addr: 66 read 22 != wrote 66
Compare error: addr: 67 read 22 != wrote 67
FAILED
No working LCD devices