Is there a way to manually test the paper sensor on my Epson printer?

Manually testing the paper sensor is difficult without specialized tools. However, you can try gently moving the paper sensor arm (usually a small plastic lever) while the printer is powered on (but not printing) to see if it registers. If it doesn't move freely or doesn't seem to trigger a response, it may be faulty. Consult your printer's service manual for specific sensor locations.