1. please check whether the sealing tape is pulled out if the blank printput is printed
2. If the laser door inside the printer does not open, the laser bean cannot reach the OPC then there will no discharge on OPC thus no toner powder will be transferred. A broken OPC shutter door will stop image to be transferred from the OPC to the paper.

a. If the page yield of compatible carts is within 5% less than OEM’s, this is normal as page yield is not just depended on how many toner is filled, but also affected by the state of printer/ environment/what you print/prints coverage/concentration setting etc.
b. If the page yield of compatible carts is less than OEM’s dramatically (more than 5%), there may be several reasons. 1. The filled toner is not enough. Usually this will happen rarely, because we have strict quality control, for each batch we randomly inspect the quality and weigh it, if the difference is big, we will find it before delivery. 2. The document customer print is with high coverage. High coverage printing will cost more toner than for each page. OEM and aftermarket producer use ISO19752 and ISO24712 standard to test page yield, the coverage is 5%. As most users print more graphics, gray scales and large amounts of text which with high coverage, obviously the page yield will not be enough.