I wonder if anyone can help. I have a Trek bike with a Bionx power assist system. The first bike was eventually replaced by Trek as the display would regularly go blank and re-boot particularly when pressing the - button to reduce assist or increase generate. The replacement bike is now doing the same thing and occasionally giving very little power even when using 200% assist. The bike is under warranty but when I sent it back to the shop last time they had never heard of this fault and neither had Trek so I'd like to hear if anyone else has had similar problems before tasking it back for the umpteenth time.