xerox phaser 4510 blank pages

[Acme]

have one of these that was calling for toner, replaced tonernand got a laser error, replaced laser and hvps and ran for about a week and now has blank pages, just replaced image process formatter and still nothing. i can hear the laser wind up but no image. any ideas?

[Corder]

Have you tried to do the so-called stop test to see if the toner image is on the drum?

[Corder]

And by the way - laser unit receiving its power from LVPS, not HVPS.