HP Deskjet 6122 Color Inkjet Printer - Manual (Page 105)

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Check if a print cartridge is low on ink or improperly installed.
resume light is flashing
the printer may be out of paper
1. Place paper in the In tray or the lower tray .
2. Press the Resume button on the front of the printer.
there may be a paper jam
Follow these instructions to clear a paper jam .
the printer may be ready to print the second side of a two-sided document
1. Follow the onscreen instructions for printing the second side.
These instructions appear when you manually print a two-sided document.
2. Press the Resume button.
power light is flashing
the printer is preparing to print
The light stops flashing when the printer has received all data.
all lights are flashing
the printer may need to be restarted
1. Press the Power button to turn off the printer, then press the Power button to
restart the printer.
Proceed to step 2 if the lights continue to flash.
2. Press the Power button to turn off the printer.
3. Disconnect the printer from the power source.
4. Reconnect the printer to the power source.
5. Press the Power button to turn on the printer.
there may be a problem with a print cartridge
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Verify that the correct print cartridges are installed.