HP/canon weird print issue

I Posted this on the laser printers forum here too
HP 3800/ canon c1022 The color image just stopped 3" from top color band test
Same on the DEMO page, looks great for 3" then stopped

prints all pages like this with image 3"

no errors

Just too weird

The Black was a prob and fixed that HV contact was too loose on that slot

All carts good// did the swap test
all the solenoids cleaned off that CRAP for the pad whats left of it!
Even the one in the ETB that can cause the color not to print at all.
ETB Good
NO Errors
Will Calibrate
ran engineer test page cymk Bands good until half way gets light fade off
PQ test pages same image cuttoff on all pages
Checked all connections of course
contacts on the LH PC HV board and all the springs/connectors
Opens and closes perfect
All belt rollers do contact the drums
very clean inside

This was printing full pages with just the black no working then it was fixed and ran text looked good.


Did print full page color bar and demo but no black
20K on total print cycle !
Not used very hard at all clean inside office only.


But the pic shows this Cutoff band on every color page
Keeping in mind it just did print full pages
and NO ERRORS at all.
Any help Guys?

this one is a prob out of no where


PUD