Printer error Info code=021
Hi, machine error/info codes usually require service. Attempting the following involves some risk, you may loose complete access to your unit or not do anything at all. It is strongly recommended that you call a qualified service personnel/professional.
However, if you feel like giving it a try while praying.....
reset the system: Power on, wait for a minute or two, Function button, 7 (keypad), Monitor button (4X), soon as you hear the beep punch * (keypad). You will now be in the service menu. If no service menu, stop, do not power off, unplug. If in service menu, 7 (keypad), Set, go to Reset Option (arrow down one step), Set. Unit will prompt you to reset, press 1 for yes, system will confirm that it has completed resetting. Go back to main menu (Stop button), power down, wait again for a minute or two, power up.
Please remember that resetting may, can and will erase all your personal settings and preferences including day/date/time, etc.
The above steps may make your unit completely useless.
If still you have the 021 code, you can brute force it to reset. Power on without a toner cartridge. In self-test, it will check itself and reset many functions to determine faults (including toner cartridge and your code 021). Wait again for a minute or two, Power off, reinseert the toner cartridge, wait again for a minute or two, and power up.
If all else fails (including the prayer) pls go back to the first paragraph.
The above steps are not mine but were described by a good samaritan.
Hope this works out for you and lots of luck.