I recently purchased a 6th generation Roku Express + (3910RW) for the purpose of using it on an old CRT television that only supports 240p/480i resolutions. I had read that the 3910RW has an RCA composite connection and can output at these resolutions.
Upon setting up the Roku Express +, my only resolution options were 720p, 1080p, and autodetect. Obviously none of these resolutions will output properly on the CRT over composite. I had to hook it up via HDMI to an HD television to actually see anything and navigate the menus. The resolution options don't provide lower resolution options than 720p. Am I missing something, or has SD support been removed from this device? It seems to have made the RCA composite connection useless.240p, RCA, Resolution, CRT
There have been similar posts in the past. Usually the complaint is that the display appears zoomed in with only a portion of the display fitting on the screen, as though a 720 image is being sent to a 480 screen.
Both this original Roku product announcement (accessed via the Way Back Machine) for the 3910 and this Wikipedia chart indicate it supports 480i (no mention of 240p).
I wonder if a subsequent Roku software update intentionally or inadvertently dropped 480i support.
Another possibility, I suppose, is that your 3910RW (the RW indicates a version sold by WalMart) may have been a stripped down model specified by WalMart to cut a few dollars from the price. I've been unable to find any information on the web re specs for the RW model.