When i turn on printer, green light comes on. when i try to print with my hp laser jet 2100 printer, the orange light comes on. i have to press the start button (biggest round button), sometimes several times, before the green light comes on and it prints. sometimes, the green light comes on and then the orange light follows. i have to do the same thing, pressing the start button, and finally it will recyle and print.

https://support.hp.com/us-en/topic/diagnostics?category=printing&issue=printer-offline

https://answers.yahoo.com/question/index?qid=20080930223228AAYKmDu

This sounds like an internal memory problem and I don't have a workaround. Before you give up, try this technique to reset the printer to factory. They are great printers once you learn this reset technique. Turn off printer. Hold down Stop/Reset button with one hand and turn printer on with other hand. After green light comes on for the ON button, press the Stop/Reset button two times and you should see the green light blink off and the orange alarm light blink "on" with the first press and then the green light comes back on for the power button and the orange light goes off with the second press (if you did it correctly). Now, you need to hold down the ON button about five seconds, then let go to shut OFF the printer. When you turn it back on, the printer should be back to the factory original condition. Make sure you set all your printer properties the way you want them again from your printer properties dialog boxes because some of the settings may have been stored in the printer's EEPROM, which you just reset to get rid of the offending alarm code.

Faded prints are possible due to following reasons.

1. Fogged red mirrors inside the Laser box
2. Alignment of the Laser Box
3. Calibration Problem
4. Cleaning Problem

I will guide you with simple steps first, if this dosen't work working with laser box is little tough & time consuming, hence will describe later.

To Calibrate the colors, Press the 'Green Button' in the front panel, use the arrow keys to navigate through menu.

Select 'System Setting' by pressing the green button again, navigate using the arrow keys and select the 'Calibrate Color', select green button to select and confirm to 'Calibrate Now'. This will take few minutes.

In addition to that, to clean the paper path, select the green button and use the arrow keys and navigate thru' menu and select 'Service'. select using the green button and navigate through menu and select cleaning option. This will take few minutes.

Try printing some documents and check whether you have fixed. If you have not got the original print quality, Let know to guide you more technically.

This is the imaging unit/drum light it has likely expired. try reinstalling it but you may need a new one.

Hope this helps

Try removing the toner cartridge and re-install it again then recycle the power.

Reinstall the printer driver again to check if driver has gone bad or not.

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