After a little vibration yesterday...not much.. I noticed today my digital readout wasnt working. I know there is a sensor on the inside where belt is that manual says to adjust to read the bolts...I looked at it and it wouldnt move easily so I left it a lone for the time being...Do I have to loosen any bolts/screws? Could anything get messed up? It doesnt do anything but tell you how many rpms you are running and wouldnt affect or hurt anything if I didnt get to it right away would it?