Remove the cover over the bobbin section so that you can see the needle bobbin carrier interaction
now turn the machine over by hand and watch the needle go down and start to come up
at this point the hook of the bobbin carrier should be very close to the needle just above the eye of the needle
It is at this point the the needle thread is picked up and run around the bobbin carrier to link up with the bobbin thread
if it is not there then take it in for an adjustment as the adjustment is done by loosening off the clamp on the vertical bar at the end of the machine that moves the needle up and down and positioning the needle in the position described
if the needle is hitting the bobbin and the timing is correct , replace the needle as it may be bent or not in properly