To check the light Pattern of your printer
Click on Light and Error HP Laser jet 1012 Printer
Check the error details from the above link
Condition of the printer
Action/Description
Ready
The printer is ready to print.
No action is necessary.
Processing
The printer is receiving or processing
data.
Wait for the job to print.
Processing...(job name)
Ready LED is blinking.
This message is displayed while the printer is processing a current job, but has not begun to pick pages.
Processing...(job name) From Tray XX
Ready LED is blinking.
This message comes up for any job, once the printer starts to pick paper.
Manual Feed or Continuable Error
The printer is attempting to Manual feed, media is not loaded in the paper tray, media loaded is the wrong size or type.
Verify that the correct media is loaded.
Press and release the GO button to continue printing.
Out of memory
The printer is out of memory.
The page you are printing might be too complex
for the printers memory capacity. Try lowering
the resolution. See Understanding print quality
settings for more information.
Door open, media out, no print
cartridge, or media jam
The printer is in an error state that
requires operator intervention or help.
Check the following:
Printer initialization
A printer initialization is taking place.
No action is necessary.
Fatal error
All lights are on.
All lights are off.
Job Cancel
All the LEDs cycle.
Canceling...(job name)
The Job Cancel button was pressed and the job is aborted.
Power ON
All the LEDs cycle.
Checking Paper Path
and Checking Printer
This only occurs at power up.
Cleaning mode/Engine test
A cleaning page or engine test page is
printing.
All the LEDs cycle.
Cleaning Page
prints
Wait until the cleaning page is finished printing
and the printer is in Ready mode. This could
take up to two minutes.
Wait until the engine test page is finished
printing and the printer is in Ready mode.
Clearing Event Log
All the LEDs cycle.
This will happen automatically during an NVRAM Init and a cold reset. No message will be displayed.
No Action is Necessary.
Power On
Initializing
This occurs when the product is powered on and coming out of EDOS.
No Action is Necessary.
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