Hello, the media unit screen in my 2017 kadjar has stopped working. Last month when using the satnav i got a message stating that it had lost signal and would shut down . so the next day when i went to turn it on nothing at all happened just a black screen . I have tried holding in the start button for 30 seconds or more and that didn't work and i then tried a hard reset but that did not work, so i took it to a dealer and of course, they told me i need a new one unit. They tried to load the software but the system kept on kicking them out, but i am not sure if they were doing this correctly as Renault tec who you called about this problem told me that the software can not be loaded through the USB, and that's what they were doing. So does anyone have any idea on how i may fix this as i can not afford a new unit?