SOURCE: Printing problem in hP laserjet 1020
just inspect your printer's front cover.there r two plastic stick which is attached with the printer cover.this two stick hit the two particular point.
1.power switch conector(left side corner)
2. scanner sensor conector(right side middle)
i think your left side stick may be broke try it.
SOURCE: blank display
If the printer control panel is blank when you turn on the printer, check the following items.
1 Make sure that the printer is plugged into an active electrical outlet receptacle that delivers the
correct voltage.
2 Make sure that the on/off switch is in the on position.
3 Make sure that the fan runs briefly, which indicates that the power supply is operational.
4 Make sure that the control-panel display wire-harness is connected. See the hint in the
procedure for Top cover.
5 Remove any HP Jetdirect or other EIO cards, and then try to turn the printer on again
SOURCE: Can you help me reset
The print cartridge in these printers utilizes a non-resettable chip. If you have purchased a refilled cartridge the seller should have replaced the chip. If you just bought toner you will need to source a chip, likely Ebay will be your best bet.
SOURCE: CM2320 NF won't complete startup.
Hello,
This usually indicates a failure of the fuser assembly. This part is what heats the toner to melt it onto the page called fusing. The fuser has a heat roller the turns when you print and when you initialize the printer. The clicking sound is cause when the heat roller is stuck and not turning and the gears are slipping. The clicking sound will come from the back right hand side if this is the case. You will need to get a replacement fuser assemble and swap them out. You can do a Google search for "cn2320nf fuser assembly" to get the correct part number. By the spelling of Colour I am guessing you are in either Canada or Europe so you may need a different part number than the US part, it would be based on line voltage either 110v or 220v
I hope this helps, if so please rate our solution.
BuddyMc
Testimonial: "Thanks for the help. I was on the right track and you confirmed what I thought. This forum has done it again. And, yes...I am Canadian."
Symbol for "light off"
Symbol for "light on"
Symbol for "light blinking"
Control-panel light patterns
Light status
Error code
State of the product
Action
All lights are off.
The product is turned off.
Press the power button to turn on the product.
Ready and attention lights blink.
The status lights cycle during the formatter initialization period or when the product is processing a cleaning page.
No action is required. Wait for the initialization period to end. The
product should enter the ready state when the initialization period is
finished.
Ready light is on.
The product is in the ready state.
No action is required. The product is ready to receive a print job.
Ready light is blinking.
The product is receiving or processing data.
No action is required. The product is receiving or processing a print job.
Ready light is blinking slowly.
The product is in low power mode.
No action is required.
Attention light is blinking.
E0
Paper is jammed in the product.
Clear the jam.
E1
The input tray is empty.
Load the tray.
E2
A door is open
Verify that the print-cartridge door is fully closed.
E4
The product memory is full
The job is too complex for the product to print. Simplify the job, or divide it into multiple files.
E5
The product did not pick up paper from the tray.
You might need to clean or replace the pickup roller.
H0
The product is in manual-feed mode.
Load the correct paper type and size into the input tray.
H1
The product is processing a manual duplex job.
Load the pages into the input tray to print the second sides.
The attention and toner lights are blinking.
E3
The print cartridge is missing or is not installed correctly.
Install the print cartridge.
The toner light is on.
The print cartridge has reached the end of its estimated useful life.
When the supply has reached this condition, the HP Premium Protection
warranty for that supply has ended.
You do not need to replace the print cartridge at this time unless print quality is no longer acceptable.
Attention light is blinking, and ready light is on.
The product has experienced a continual error from which it will recover on its own.
If the recovery is successful, the product continues to the processing data state and completes the job. 
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