Weird half-screen glitch

[elmo5933]

Hello all. This is my first time ever working with an arcade1up, along with a raspberry pi. I was following a youtube tutorial on how to set up retropi on an arcade1up, and ran in to a couple of issues. The machine I am using is the Ms. Pacman one, so I had to flip the screen. I thought that flipping the screen would fix all my issues, but it didn't. I tried removing the black bar thinking that would fix my issues, but it didn't. Here is a reddit post I made that contains a photo of what my machine looks likes.

https://www.reddit.com/r/Arcade1Up/comments/oxd1p1/does_anyone_know_how_to_fix_this_i_managed_to/?utm_medium=android_app&utm_source=share

One person responded to me saying that this happened to them, and the way that they fixed it was by using a different hdmi converter. I was wondering if this is the case, or if I just simply did something wrong here. I don't think its the power supply I'm using because when I plug the pi into my monitor (and external one), everything works just as intended.

Would appreciate all the help I could get.

Thanks in advance.

[dankcushions]

please fill in all of https://retropie.org.uk/forum/topic/3/read-this-first

[elmo5933]

Pi Model or other hardware: 3 B
Power Supply used: inland 5.25V 2.4A Micro USB
RetroPie Version Used (eg 3.6, 3.8.1, 4.1 - do not write latest): I think 4.1?
Built From: Standard; haven't added any images or anything like that
USB Devices connected: Button converted to usb, keyboard
Controller used: none (unless you cant the button and joystick)
Error messages received: no error message, the screen just looks off
Verbose log (if relevant): idk what this means
Guide used: (Mention if you followed a guide): am following and using the parts from this youtube video:

Also looked up how to screen tilt (did the screen rotate 3) and remove black bar (took out the # in that code)
File: Don't think a file is the error, as it works fine on my monitor but not the arcade1up
Emulator: (Name of emulator - if applicable) using the retropi with atari and nintendo
Attachment of config files: don't think its a files issue as per the reason above
How to replicate the problem: to replicate the problem use one of the machines with a vertical screen (Ms. Pacman, for example) and use the parts that are listed in the youtube video: HDMI LCD Controller Board: https://amzn.to/2QlKKfr , Arcade Sticks Buttons and Encoders: https://amzn.to/2ItwRt5 , Pi 3 B