Running Roku Ultra to LG S70TR pass through to BenQ HT3550.
Tried two Roku Ultras, same issue. Old Roku 4k stick works fine (trying to replace as it's overheating, probably 8 years old).
For both Roku Ultra and Roku 4k Stick, I turn everything on, HDMI not detected, switch HT3550 from Enhanced to Standard, screen pops up. On HT3550 change HDR from Auto to Off, then switch from Standard to Enhanced. Switch Display Setting from 1080p to 4k.
From here forward works on the 4k Stick but not the Ultra: instead of switching from 1080p to 4k, switch to 4k HDR 60 FPS, then switch HDR back from Off to Auto. Works 100% fine on 4k Stick. On Ultra the HT3550 reads No Input and have to restart the process from the start and not turn HDR from Off to Auto, but then I don't have HDR.
Please help it's driving me crazy. All HDMIs are 2.1. LGS70TR works for 4k HDR 60fps pass through (as noted it works on the 4k Stick). Idk why the Ultra doesn't work.