My e-bike display won't turn on after washing the bike. What should I check?

Check the display cable connector under the handlebar near the stem. Water washing can knock it loose. If it's half out or wet, unplug it, dry it, and push it back in all the way. Then hold the display power button for three seconds. Avoid spraying directly at the handlebar area when washing. If the battery shows lights but the display stays dark with everything plugged in, contact the company to start a warranty claim.