Robo-Tank 3rd Generation Hardware

[Rob F]

Ah that makes sense, the reason it appears locked on splash screen is because the eeprom is acting up, if this happens it rolls through the 3000+ settings and could take 10+ minutes before the display starts up. The communication between them is ok so cable is fine. This could be a couple things, the eeprom could be bad however that's been quite rare, whenever something happens with the eeprom it's usually related to the I2C bus as it uses this. Can you check the voltage on the SCL1/SDA1 pins on the controller board. There's a 2 header pins at the top of the board with spare pins, these should have 5v on each. Also if you check where the arduino plugs in, the pins are marked, it should be 3.3v on each pin.

I have a feeling the issue could be the I2C buffer, if you look on the controller board behind the two USB ports you'll see a 8pin IC, if you can remove this I think it'll get the rest working.