Turn the printer off, wait 10 seconds, and turn it back on. The "Service Required" error should be gone.
Here is the exact workflow to get the program functioning for your SX125. epson adjustment program sx 125 work
The Epson Adjustment Program (often abbreviated as EAP) is a service utility designed by Epson for authorized technicians. It is not intended for public distribution, but it has become widely available online. This program allows users to reset internal counters, fix ink pad waste errors, and recalibrate various mechanical functions. Turn the printer off, wait 10 seconds, and turn it back on
For the Epson SX 125, the program is crucial because this model lacks a user-replaceable waste ink pad. Once the internal counter hits its limit, the printer locks itself down to prevent ink overflow. Turn the printer off