I have an HP Deskjet 930C printer and I was printing onto some card. When it was taking in the next sheet it suddenly started making a horrible noise and wouldn't take the card in.
I have taken the casing off to try and identify the where the noise is coming from and it seems to be from either the motor or the cogs at the right hand side, just under where the ink cartridges usually sit. The cogs seem to move but it won't take paper in and the orange light comes on after about 3 seconds from switching it on, then it all stops(as you would expect).
The noise is a sort of stuttering as though perhaps the cogs are hitting something as they go round, but I can't see anything there.
I hope this is descriptive enough.