HP 8550mfp Service Manual - Page 492

Service LED flashing patterns The blinking of the service LEDs will be 0.5 second on and 0.5 second off during the coding sequence. After a two-second delay the sequence will be repeated. Table 50. Service LED flashing patterns LED Meaning LED blinking pattern (number of blinks) Solid green Device OK Blinking green Device detached from the printer Continuous blinking Blinking yellow Staple jam 1 Jam in flipper 2 Jam in paper path 3 Jam in accumulator 4 Jam in carriage 5 Blinking red Stapler malfunction 1 Flipper malfunction 2 Malfunction in paper path 3 Accumulator/offset module malfunction 4 Carriage malfunction 5 Controller PCA malfunction 6 User LED status interpretation The blinking of the user LED is continuous. Table 51. User LED status interpretation Color Solid/blinking Meaning Off Green Green Amber Amber N/A Solid Blinking Solid Blinking Printer in powersave mode or device not receiving power Device is on and ready Device is in service mode Device has a hardware malfunction Device is not correctly attached to printer, one or more bins are full, or device has a paper jam or a staple jam 490 Chapter 7 - Troubleshooting EN