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Actually, I only changed the Alienation bars and the color registration detection assembly in one of the three. In the other two I only did the procedure you gave.

Worked with the others as well. Thanks again. I've been fighting this for nearly 3 years altogether from the first printer to the third one.

O - M - G!!! I couldn't do the NVRAM so I followed your instructions for resetting values for the DC controller and it worked! Now I'll try it on the other printer and let you know if it works on...

Thanks! I will try that and let you know. Any idea why that is happening on every 4650 like dominos? Also, when I did a cold reset on one of the printers, I was unable to use refurbished toner...

sorry, I meant - I'm only using remanufactured toner cartridges now.

ok....no refurbished.

Hey, redcow....what is the purpose of removing the JetDirect (stupid question?)

Thanks prntrfxr. You know, the strange thing about this is that I've used oem's for the first printer that gave out, refurb's with the second in that gave out and switched companies with the third...

I will try that....but I have replaced toner over and over until it was ridiculous and it didn't help. Why is it that the black is the one out of alignment? The 54.12 is the cyan density sensor,...

I have 3 HP 4650 color laserjet printers that now have the same problem. On the event log, the error shows 54.11, then 54.OF, then 54.10 - all "CPR Sensor out of range" and my black print is...