I have a Canon NP 7130F which prints out only blank paper

do you already change your drum?pull out your developing unit and you can see cooper plate inside the machine,possibly its broken or this problem due to yourHV board.You can try change your AE sensor.
Very old model

check the developing unit gear & transfer roller

toner, charge or dev not in position or of cause we could go for upside down original, my guess toner 75% Carona/charge roller 20%, 4% Dev unit outa position, 1% blank original.....hows that for 20 years summed up on white paper;)

check toner maybe its near to end.

1) you do not dump toner into the drum! Juo dump it into the toner unit.
2) didi you after replacement put the blue toner handle (right from toner unit) into the left position?

Hello sir; The problem is caused by drum cleaning blade, you need to replace drum cartridge or drum blade if you can.

try also to change or to service the corona units both the upper corona in the drum unit and the the transfer corona assembly unit down the drum. ok try your best.

does anyone know where to get an owners manual for cannon np7130f online for free??

This is the add toner light. Replace the tube of toner and will be well.

hi im jules_09.have check the drum unit and the fuser unit check the two unit.first of all the drum unit the drum may be scratch or damage that goes with the fuser unit too.