I have no display on my BMV 712 Smart today. I did yesterday. Admittedly I was messing around in the engine bay in the area with the shunt in it yesterday and may have knocked it. But I'm pretty sure it was working when I finished. I see @theferrett had a similar issue at the start a couple of years ago so I have checked the red wire in B1 as suggested by @Gravely Headstone in that chat. I was getting 12V+. I have taken out and reinserted that wire multiple times and also the other cable that goes to the monitor (hoping for just a dodgy connection). I am thinking I will have to replace the PCB on the side of the shunt to see if that is the problem but is there anything else I can try before I spend money and wait for the part to arrive? Is there anything I can do to fault find at the actual monitor?