Code :

Code: 55
Display: 55
Description: Printers this is due to the DC controller not receiving the proper information upon startup. Check the connectors on the DC controller and power supply. If you don't hear the motor immediately and you don't have a paper jam, change the power supply.

Code: 59
Display: 59 Add Memory
Description: Not enough memory for PostScript option. Verify SIMM's are seated properly, replace any defective

Code: 67
Display: 67 Defective
formatter PCA
Description: This can also be a temporary error or a defective paper guide plate assembly. A switch on this assembly may not be activated properly. You can remedy this by replacing the paper guide plate assembly, RG5-248-030. Caution needs to be used when installing the new assembly - be careful of the sensor flag spring!

Code: 79
Display: 79
Description: Software/drivers, Memory PCA's, Font-Macro-Personality Cartridges, option I/O Cards. Defective toner cartridge in the Laserjet 4 Plus only. Remove any accessories (font cartridges, memory PCA's, SIMMs, etc.) plugged into the formatter card and try again. If the problem persists and is application specific, verify proper setup with application vendor.
Defective Formatter PCA - Replace with known operational board and try again.

Code: 80
Display: 80
Description: Improper MIO connection - look at pins on formatter MIO connection
Defective MIO Card - Replace card
Defective Formatter Card - Replace card

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