How do I clear an E3 error on my HP M1136 printer after removing visible paper jams?

After removing any visible paper, power off the printer, then unplug it from the wall for 60 seconds. Reconnect and power on. If the error persists, carefully inspect all paper trays, the duplexer (if equipped), and the output area for small scraps of paper or obstructions. Also, check the paper pickup rollers for damage or debris.