Here are some steps you can follow to remedy the problem:
1. Turn the printer off, and remove the rear cover. Check the connector JFUSER1 for proper connection to the system card, the cable for pinch points, and the cable or connector for any other damage. Is the cable damaged? If yes, replace the fuser cable. If not,
2. Remove the fuser. Check the DC autoconnects on both the fuser and the printer for damage. Are the connectors damaged? If yes, replace the JFUSER1 cable. If not,
3. Check for the following continuity between the DC autoconnect and FUSER1. Is the continuity present? If yes, go to step 4. If not, replace the DC fuser cable.
4. Replace the fuser. Does the error clear? If yes, problem solved. If not, replace the system card.