Raspberry pi4b and pi2jamma problem

[Mr20to5]

Surely the pi would output video even without an sd card? It’s gotta be the pi4??

My earlier comment still stands. You think/thought it was the pi. So why not rule this in/out first?

Just forget about the intended final use and treat it like a pi. Use a decent psu, with enough power, download the standard pi image using the standard os imager and check it works.

Then you can move on knowing it isn't the pi and therefore must be incompatibility with the image you would 'like' to use.

 

[Retroman839]

Asap Always start at power

 

[Fantazia2]

And use the software that the arcade forge website itself says you need to use for Pi4 compatibility instead of shotguning any and every other image you can find.

 

[Retroman839]

Arcade punks - It’s possible you got a bad download .

Like a above have said get a good bonafidi image . No better place to start

 

[Chihiro]

I started off with the images on the official PI imager software (such as retropi & added my own rom pack) then went over to Arcade punks as a progression.