The phrase "conks out" is commonly used to refer to a device or machine suddenly stopping working or failing to operate. Some antonyms for "conks out" are "continues," "operates," and "functions." These words suggest that whatever was experiencing the issue has not stopped working and is still running successfully. Another antonym is "starts up," which implies that the device or machine has been successfully restarted after experiencing an issue. Other antonyms include "runs smoothly," "operates flawlessly," and "performs without interruption," all of which suggest that whatever was experiencing issues is now functioning correctly without any problems.