Android 9 TV Won't Boot From eMMC (No Output)

I recently bought a Rock Pi 4 Model B with 2 GB of RAM a month ago. The microSD slot was loose and broke off right away so I had to buy an eMMC module instead to keep using the board since there doesn’t seem to be any replacement policy. So I got the eMMC module today, it flashed successfully and the first time I powered up the board with the eMMC module (never powered on before) it briefly booted to TWRP then went black screen and after that no video output to my TV. The board had the green power LED on and a blue LED flash repeatedly flash 2 times every second.

Anyone have this issue before or know how to fix it? I’d really like to be able to start using this board soon and I’m currently totally reliant on the eMMC.

The blue LED blinking means the system is on, try to plug and unplug the HDMI cable. Is your TV 4K?

Thanks! Unplugging the HDMI and plugging it back in worked perfectly. And yes I am using a 4K TV for this.