What steps should I take if the print head carriage is stuck, leading to error 5012?

If the print head carriage is stuck, first power off and unplug the printer. Open the access cover and locate the carriage. Carefully inspect for any visible obstructions. If you find something, gently remove it. If there's no visible obstruction, try to gently slide the carriage to the left and right by hand. Avoid forcing it. If it moves freely after clearing any potential obstructions, reinsert ink cartridges securely and close the cover before powering on.