Diagnosing and repairing Epson printer connectivity issues involves a systematic approach. Begin by checking physical connections and ensuring all cables are securely plugged in. Verify that the printer and computer are on the same network and within range. Resetting the router can resolve temporary network glitches. Updating printer drivers and firmware is essential for compatibility. Consider disabling any firewall or security software that may be blocking communication. If using wireless, reconfigure the network settings on the printer.