Is it possible to use a HDMI modded GBA with a capture card?

[Justin20020]

Hello guys,

I modded my GBA with a lcd display, the cleanjuice battery mod and now I added a HDMI mod on my GBA. I‘m using an Elgato 4K Pro as my capture card. Previously I used my Elgato HD60 S for my primary use before I bought the 4k Pro. My problem is, the 4k Pro cant give me an tv signal out when I‘m connect the GBA with an HDMI micro adapter to an regular HDMI cable. I only got sound. But if I use the HD60 S I can get the tv signal.

But I want to use my 4k Pro anyway for the GBA.

Do you know if I‘m something mistaken with my setup? Or is there a Driver what I need to use it properly? (Before u ask, yes my capture card (4k pro) can capture my other consoles

 

[LightMindedJedi]

my guess would be that you need an upscaler to upscale the video output to a resolution compatible with the capture card