I am a high school teacher working with a donated canon 40D to loan to students for projects.
A student wants to shoot manual mode on the camera, but the lens (Canon Ultrasonic EFS 17-85 mm) won't fire. If I set the camera body to any other setting, it doesn't have a problem.
Is it a bad sensor? Can it be repaired/ worth the cost of repair? I've cleaned contacts and the lens looks to be in great working order. I'm assuming a former student has dropped it at some point but I didn't catch the error code until this year.