Hi GregNewYork,
I see that you are having some problems with the ADF. It isn't sensing the paper loaded on the Laserjet 100 M175.
I will be happy to help you.
Make sure the printer is connected directly to a wall outlet. (don't use a power hub or a surge protector)
I have provided a document to go through the steps to see if it will resolve this issue.
Disregard the title. Both models are pretty similiar for the ADF.
Hope this helps.
Thank you for posting on the HP Forums.
Have a great day.