Samsung Multifunction Printer Error Code S6-3128

S6-3128 indicates that the printer attempted 802.1x network authentication and was rejected by the authentication server. This happens when the server finds a mismatch in the confirmation protocol, server address, or user credentials submitted by the printer. It is a network configuration error, not a hardware failure. Correcting the 802.1x settings on the printer will resolve it.

A factory reset may clear the error temporarily, but it will also erase the 802.1x settings entirely, meaning the printer will not be able to authenticate to the secured network at all until the settings are reconfigured correctly. The proper fix is to correct the specific mismatched settings rather than resetting the device.

Since S6-3128 is a software and configuration error rather than a hardware failure, there are typically no parts costs involved. If you resolve the issue yourself by correcting the network settings, the cost is nothing. If you need a technician or network professional to assist with diagnosing the 802.1x configuration, expect service fees in the range of $50 to $150 depending on your location and provider.

Access the printer's network or security settings and locate the 802.1x authentication configuration section. Re-enter the correct server address, select the authentication protocol your network requires, and update the username and password to current valid credentials. If you are unsure of the correct values, contact your network administrator for the exact 802.1x policy details.

No, S6-3128 is not a safety concern. It is purely a network authentication configuration error and does not indicate any electrical, mechanical, or fire risk. The printer's hardware is not affected, and the device can typically still be used via USB or other non-802.1x network connections while the issue is being resolved.