XBOX One X - HDMI Splitter into Input

I was using a 4x splitter with the "out" HDMI to a 5040UB Epson Projector. I plugged the xbox into one of the 4 input hdmi spots on the splitter. My laptop was put into another and a TV Box into another. It did not work. The screen frequently blanked
out and during any video activity from any of the input devices did the same. I changed all the HDMI cables to the best 4x I could buy and this still didn't help.

However, when I connected the splitter to the Xbox one x (one of two HDMI connections) and the Xbox one directly to the projector everything worked perfectly. I could switch between any of the inputs to the splitter. Of course when I wanted to use the
xbox one x for all the xbox stuff I simply went to the xbox home screen and away things worked with no issues.

You are actually using a HDMI switch, which is different from a splitter. You need a 1 in 2 out HDMI splitter. You will connect the HDMI from you cable/sat box to the splitter, then 1 HDMI from the splitter directly to your TV to watch like normal. Then
the other HDMI from the splitter to your Xbox one HDMI input, and another HDMI from Xbox one output to the TV. Check out the video like I posted for more info.

Watch "Xbox One Cable Box HDMI Splitter" on YouTube

https://www.youtube.com/watch?v=ryH1G3-yw-g&feature=youtube_gdata_player

Rereading your issue - I have a feeling it does not have support for splitting the input into the xbox one x. I am not sure the input sees the different devices as a viable signal- it almost seems as it needs a current-stable signal to works having multiple
devices on at one time may cause the conflict.

Spec sheet:

https://news.xbox.com/wp-content/uploads/Xbox_One_Spec_Sheet.pdf

There is a forum post on reddit that have input questions:

https://www.reddit.com/r/xboxone/comments/7az2t3/does_hdmi_in_on_xbox_one_x_allow_for_4k_hdr/

I hope this will help - but I think this is outside of the use of the Input, I have found a ton of one device connection videos - but not one of a switch box into the input.

I recommend this to the xbox think tank -

https://xboxideas.uservoice.com/

I will keep trying to help out.

You gotta remember to.turn off now using devices

Remember a spliter is not meant to send more.then one signal at once

Then more you cram into a single.pipe the more you are spliting the same limited bandwidth

Also you must have a hdmi 2 cable snd gold plated

Not all cables are created equal neither are spliters

Fyi here is a review from the link you provided

"I let it sit for a while before testing because I didn't want to take the time to rewire everything, re-setup my harmony universal remote, IFTT actions and so on.. but last evening I had a spurt of productive
attitude so I took about an hour re-routing cables and re-organizing my TV stand to allow this switch to fit. Upon plugging everything in (Nintendo Switch, Xbox One, PS4 Pro, Nvidia Shield TV) I noticed one of the inputs was on the front of the box, "weird
configuration," I thought to myself, but continued on. So I proceeded to test everything. Nintendo, works. Nvidia, works. Xbox one, works.. let me see if HDR is enabled. Hm, that's odd HDR in the game isn't enabling, let me try the PS4.. No luck. No video,
no sounds, got a flicker when turning on the console but then nothing. Tried rebooting everything, same result. Plugged PS4 direct to TV works fine. Tried some tips I found on forums (disable HDCP, YUV only, RGB only) no good. Changed output settings to 1080P,
works fine. Sound, video, just fine. I say all that to say that the box says it supports 4K UHD/HDR, but my results say otherwise"

Spliters are pretty new and iffy because yoi are trying to add a lot of high bandwidth devices crammed into one very very small and limited connection ontop of that feeding it into the xbox to proccess
and render

This assumes you have all gold plated and hdmi2.0 cables

For 4k this includes the cable from your xbox to your projector

The cable from.the xbox to the spliter

And the devices to the spliter are all hdmi2.0 and gold plated

(Yes the connector plating is important due to resistance of theterminator)

unless you got the latest apple tv 4k box the earlier gens didnt have it

None of your connecting devices will display in 4k

Except for fios and only on the 4 verizon 4k channels you would.have to.switch to the 4k channel Iaccordingnto verizons website) then turn on hdr on the xbox but generally you cant use 4k on the normal
channels

It is normally assumed you are doing a direct connection in which case the host device detects what type.of signal you are using

Xbox one x will.detect but because you are mixing in non 4k devices you are going to have hit or miss

Since you have devices like apple tv or.steam link that dont support 4k hdr

If you tell the xbox or your tv its a 4k signal when its not you will get a blank screen

steam only supports 4k.on an actual pc via.the steam client not.a tv

The ps3 will only use 1080p

This is all posted on the respected forum websites for each respected forums

Ps3 is a given a non 4k and even if yoi have the ps4 pro well lets just say hdr with ps4 pro is aa hit or miss with non sony tvs wanna know how I know? Because I got a ps4 pro and sat for 1 week going thru sonys settings and my samsung settings and even
droped upscaling it still.wont do.4k

If you had a decent quality tv like lg or samsung they upscale non hdr signals to 4k

Your 60hz issue might also be the same issue OP has. Depending where he lives and the TV he owns it could be freaking out the Switcher. Nice catch.