Setup is Chromecast Ultra to Sony STR DN1080 amp to Sony VPL-VW320ES Projector. The chromecast is not displaying in 4k. When connected directly to the projector it displays 4k, and indeed when connected through the DN1080 and the chromecast is rebooted it uses 4k for the loading screens then drops to 1080p. Tried multiple settings, and hdmi ports, on the amp to no avail. All other devices, XBox, Bluray Player, PS4, Linux set top box, are not having any problems with the setup and display in 4k resolution just fine. Just wondered if anyone has any ideas on what to try to get the chromecast to do 4k through the amp.
Thanks in advance
