Laserjet 4 Plus Blank Pages

[DonR]

My 4 Plus started printing blank pages. I replaced the transfer roller, the toner cartridge, and the high voltage power supply and I still get blank pages. There are no error messages during self test. What else can I do?

[vapour]

its posabble the lever broke at the laser scanner. it is a shutter. if it dont open the image cant get to the drum on the cartradge. you will have to take the top cover off. and the laser is right there on top its in a black housing. the shutter arm is on the right make shure it opens when you put the cart in you will see it move the arm when you insert the cart

[DonR]

Thanks Vapour. After I posted I did a more thorough search and looked in some other forums. Sure enough that was it. Problem solved.