HP 2420 HP LaserJet 2400 Series - User Guide - Page 137
CONTROLLER ERROR, turn off then
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Interpreting control-panel messages (continued) Control panel message Description Recommended action 55.XX.YY DC CONTROLLER ERROR alternates with To continue turn off then on A temporary printing error occurred. 1. Turn the printer power off and then on. 2. If the message persists, contact an HP-authorized service or support provider (see HP customer care). 56.XX ERROR For help press alternates with To continue turn off then on A temporary printing error occurred as a result of an incorrect input or output request. 1. Turn the printer power off and then on. 2. If the message persists, contact an HP-authorized service or support provider (see HP customer care). 57.XX ERROR For help press alternates with To continue turn off then on A temporary printing error occurred in one of the printer fans. 1. Turn the printer power off and then on. 2. If the message persists, contact an HP-authorized service or support provider (see HP customer care). 58.XX ERROR For help press alternates with To continue turn off then on A printer error has occurred where a memory tag CPU error was detected, or there is a problem with the air sensor or power supply. To resolve problems with the power supply: 1. Remove the printer from any UPS supplies, additional power supplies, or power strips. Plug the printer into a wall outlet and see if this resolves the problem. 2. If the printer is already plugged into a wall outlet, try another power source in the building that is independent of the one currently being used. The line voltage and current source at the printer location might need to be inspected to ensure that they meet the electrical specifications for the printer. (See Electrical specifications.) If the message persists, contact an HPauthorized service or support provider (see HP customer care). 59.XY ERROR For help press alternates with To continue turn off then on A temporary printing error occurred. 1. Turn the printer power off and then on. 2. If the message persists, contact an HP-authorized service or support provider (see HP customer care). ENWW Understanding printer messages 125