Got this error with my Epson 2250. The projector itself is fine, I can still use the other hdmi port without issue, but it looks like the built-in streaming stick doesnt work,
From AVR no projector signal but TV signal ok | AVForums
User manual Epson EB-S05 (English - 170 pages)
EPSON EB-U50 USER MANUAL Pdf Download | ManualsLib