Hdmi Splitter Troubleshooting With Roku 4 (Input And Output)

[yourpctechguy]

Hello, I bought a pair of virtual 100" screen glasses from Amazon.
The purpose of them was to watch movies with my wife at the same time.

The glasses connect to the control box which is where you turn the device on or off, change the modes 2d, 2d-3d, and side by side/volume control.
From the control box there is an HDMI mini port that connects to it and the other end has to be the HDMI to connect both of the control boxes to the HDMI output on the HDMI splitter.

I then connect the Roku4 to the input on the HDMI splitter.

I keep seeing No Signal in blue with a drawing of a square with a question mark in the middle.

I tried to go directly to the Roku 4 without the splitter and it works 100%

I bought a new HDMI splitter but the same-thing happened.

I would like to know what's the problem? I feel it might be the cables going as input from the Roku 4 to the HDMI splitter .....

It worked 2 days ago and then stopped it's of and on and it's annoying thanks,