When your HP LaserJet 4700 suffers from repeated error messages and other problems, performing a cold reset is often the best way to resolve the problem. Doing a cold reset on the HP 4700 is not difficult, but it is important to follow the proper steps.
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Press the power button to turn off the printer and then remove the power cord. Allow the printer to sit for a couple minutes and then replace the power cord and press the power button to start it back up.
Watch the panel on the printer until the memory count begins and then press the "Select" button and hold it in. Continue holding the "Select" button until the lights on the printer flash and then stay lit.
Press one of the arrow keys when the "Select Language" message appears. Use the arrow keys to scroll until the "Cold Reset" option appears. Press the "Select" button to verify the cold reset and continue the power-on process.