Issue with my Profilux 3 temperature, the reading is either 20c if the probe is disconnected or 40c if connected

I was having trouble connecting to the control centre so I unplugged everything and took the unit to my PC to connect via USB. Whilst connected, I updated the firmware and everything looked okay.

Plugged all the connections back in at the aquarium, and now the temperature sensor doesn't work and the display is unreadable (very pale). The pins are all okay and nothing changed or damaged.

I've tried setting the display to 100% for day and night, I've tried a factory reset and also a temperature recalibration via the remote control feature on the PC.

All failed to fix the display or temperature reading

What else can I try?

Sent from my SM-G965F using Tapatalk