Printers often go for extended periods without a power cycle and can cause the device to be unstable

Give your printer a fresh start by unplugging it and plugging it back in.

Once the printer is initialized, try printing again

Sometimes a print job gets stuck in the queue or a print spooler service has stopped.

Running this utility clears the spooler queue and restarts the print spooler service

This utility is located on the users desktop

Sometimes your workstation needs a fresh start

Reboot your device frequently, especially if it is continually put to sleep and woken back up repetitively throughout the week. 

It is recommended to restart your workstation several times a week to ensure it is applying updates and restarting required services.

Please use genuine Lexmark toner compatible with the MS823 printer - 58D1000

Follow the step here for maintenance Toner or Drum Maintenance 

See link here for purchase options - 58D1000