HP Color Laserjet issue

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http://serverfault.com – Since this site is a Q&A for system administrators and desktop support professionals I'd decided to post my question here. Not sure if this is the best stackexchange website for this. We have an HP Color Laserjet 4700n of course out of warranty. And we have an 49.4CF2 Service error. According to several sources online, this is firmware related. When I switch of the printer and switch it back on, it gives this error again. I have tried to give it a cold reset. But that didn't work either. I have downloaded both firmware downloads from hp.com first one has an application which transfers th (HowTos)