Sorry to say this but you can throw that gauge away. I mean put it aside if you ever want to open it up one day to read your mileage. The plastic is glued/welded shut. I opened mine up with a heat gun and a saw. Fixed it to some level by taping it down etc. I was getting a correct fuel reading out of it until the screen died completely on my way to MotoGP one year. The good thing is, the signals, high beam, neutral light and oil light doesn't get affected by the screen dying. The speedo has a glass, sitting on a conducting plate that sits on a circuit board and once the pressure between the glass and the conductor gets messed up, the whole display goes crazy. I would be surprised if the dealer can fix it too. Since they would also have to break/cut/melt it to open it up. Maybe they can fix it and put a new plastic body on it but I really doubt it. And if you going to pay for that service + parts, you might as well invest in a new one IMO. Look out for a used one on the forums, ebay etc. You can get one under 200$ that way. Good luck.