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05-06-2012 08:47 PM
I have an HP Color Laserjet 5550 DTN displaying the following error on it's LCD screen "RFU LOAD ERROR RESEND RFU OVER PARALLEL PORT". I connected via a mini-parallel cable and issued the command via Windows command prompt:
copy /b clj5550fw_07.200.5.rfu lpt1:
The LCD screen read "RFU RECEIVED, CYCLIING POWER". After at least 20mins the printer had not power cycled so I turned it off and back on again. I can now see nothing on the LCD screen. No memory checking viewable and no LEDS light at all.
Is there a way to perform the firmware upgrade again or am I going to have to purchase a new firmware DIMM. I believe the part number for a new firmware DIMM is HP Q7725-68002?
05-08-2012 08:40 AM
The HP Color LaserJet 5550 Printer series are commercial printers. I recommend posting in the forum for HP Business Support for a better chance at finding a solution.
Here is the link to the Commercial Laserjet board:
Also, here is a link to the support page:
10-23-2012 05:01 AM - edited 10-23-2012 05:03 AM
I guess it could be useful to those arriving here, to have the direct link to the thread that Mike opened about this problem:
There, you will find more information regarding the problem and the way with which Mike solved it.