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It you take the drum out, look on back, there is a little fuse on the top rear of the drum . Replace that fuse. Radio Shack will have them. Once the fuse is replaced, put the drum back in, It will see a new fuse, blow it and reset the counter. Really easy.
When replacing drums you have to have the printer off first, so the drums will reset.
The best way to do this is to contact Rich @
you can get the fuses cheap, and you will have to take apart the drums and replace the fuse, expect an hour or two to do this.
Cant remember if these models use the rebuildable pcus or not.
If it does:
change the developer / blade / charge roller/brush and drum if needed then run the TD initilization .
If copy quality is good then you can run td ini without changing those parts and just replace them at failure.
If it doent:
Change the whole pcu
it will reset itself
or if copy quality is good run the td ini and the message will clear.
That should have reset itself. A couple of things. You may have received a bad cartridge and need to report it as DOA, from wherever you purchased it. Also, sometimes if you replace the drum when it says : Drum unit low or reorder Drum, and you replace it before it tells you to replace the drum, it will not reset. There is a fuse that blows quickly and resets the counter. That may not have been attached right and not the machine did not detect a new cartridge.
the clear key may be stuck which seems to lock up your machine. The procedure to reset the drum lite is clear, auto (exposure setting), clear, auto when hit in a timely manner the display will go blank. Enter 24 then press the start key, then enter 07 and press the start key again. If you can't get the keys to work the circuit board may have cold solder joints.
When the Imaging Drum LED stays solid on, it means your imaging drum is running low and will soon need to be replaced. You can unseat, then reseat it and see if that solves the problem.
If everything is printing fine, don't do anything until the LED starts flashing. HP will tell you to replace the drum immediately, but mine was on for a year, with moderate printing, before going to the flashing, "empty" state. This is the same advice as for toner cartridges, which are sometimes as much as 50% full when the light comes on.
However, I suggest sourcing a new drum so you can be prepared for when the existing one goes out. Also, despite HP's warnings of gloom and doom, aftermarket products work acceptably.