CRT PAL screen flicker (RCA/Composite)

edmaul69

@Jakob-Holz shortening it, and getting it away from the caps should do the trick. Shielding it isnt neccessary. If you need to you can twist your composite and ground wires going to the pi if you are still having video issues.

edmaul69

@Jakob-Holz also remove that point on the 5v solder joint. You could be creating a spark gap with it pointed right at the ground.

Jakob Holz

Fuck yeah! It works, flawlessly!

First I desoldered my previous jumper. Then I thought, when I'm already at it I could also remove the Buck Converter. So desoldered the sucker and made a shorter jumper.

It worked.
But I was curious whether it was the jumper or the ic that caused my suffering. So I resoldered the old, longer jumper and tested it.

Turns out it wasn't the jumper that caused the issue. The dc to dc converter must have caused some kind of noise on the +5V rail.

(picture with long jumper)
Anyways, I reresoldered the short jumper but I didn't come around noticing very sudden coil whining with both configurations, but I can't tell whether that was also the case with the ic still onboard, simply because it is so minimal.

So thank you so much for taking your time and effort patiently helping me.
I hope others with the same problem can refer to this.

edmaul69

@Jakob-Holz if there is noise try twisting the 5v and ground. If that doesnt do anything try the ground and composite.

edmaul69

@Jakob-Holz also shortening the wires will help interferance a lot.

Jakob Holz

@edmaul69 Well I'm planning on transforming the thing into a Gameboy, a "Piboy" if you will and you can't really hear the noise anyways so it doesn't really matter.
But I got just one problem left: overscan.
Changing the overscan settings in the config.txt nor the rspi-settings change the overscan in the retropie.
Do you know anything about that?

edmaul69

@Jakob-Holz if i remember from the one i did there is a dtoverlay that needs to be added to the config.txt that will put it in 320x240

Jakob Holz

@edmaul69 Ok thanks for your advice, I'll do some research.

Jakob Holz

@edmaul69 Ok I did my homework and found that some lines in my conig.txt were doubled for some reason. So it was simple as removing those doubled lines. Thank you

edmaul69

@Jakob-Holz glad to see it is working for you. Unfortunately so many guides tell you to add lines to the bottom of the config but fail to mention it is already on the page somewhere else and may or may not be # hashtagged out.