4500 won't print anything, no error code

[bkaraus]

HP 4500 was printing in monochrome only then nothing. Paper comes out with nothing on it, no error codes just blank pages

[MichaelTech]

1st. check Imaging drum for tab on the front left. This opens the shutter on laser.
2nd. If networked, can use JetAdmin to check consumable status.
3rd. Replace all consumables, do engine test {tiny hole on right behind panel}
4th. Possible H\V problem. May just be dirty inside. Lots of sensors and connections need to be cleaned.

[David]

Check HP website, there is a problem with transfer unit when they spit out blank pages, replace transfer unit.