Code :

Code: 57
Display: 57 Fan error
Description: The cooling fan (FM1) rotates for approximately 35 seconds at initial start up and during a print job. The fan rotates about 30 seconds after a print job concludes.
Remedy: 1. Turn the product on. Listen to determine if the fan is operating. The fan is located on the upper right-side of the product. 2. Make sure that the fan connector is security connected to J1105 on the connector PCA. 3. Replace the fan.

Code: 59.X
Display: 59.X Error
Description: A malfunction has been detected with the product's main motor. During normal operation, the main motor should rotate for about six seconds after the product is turned on.
Remedy: 1. Turn the product off and then on. 2. Make sure that connector J202 on the engine controller PCA is seated. 3. If the error persists, replace the main motor

Code: 79
Display: 79 Service error
Description: An incompatible DIMM is installed.
Remedy: 1. Turn the product power off. 2. Install a DIMM that the product supports. See Parts and diagrams on page 253 for a list of supported DIMMs. See Install memory (HP LaserJet P2050 Series Printers only) on page 64 for DIMM installation instructions. 3. Turn the product on.

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