Sometimes wave shaped lines on Gboy Screen like old crt

[Darkside19]

Hi guys, I need again your help, because I can't figure out whats wrong. In dark colors/bright colors or RVloader Menu I get kind of wave shaped lines that you can see all over the screen, thats looks like a old crt you are gaming on. It's just sometimes more or less visible. idk what's wrong maybe something with the wiring or is this normal with the gboy? It's my first Gboy. I'm a noobie so please forgive my "not so clean" build. I used some special glue to get the cables seated that I don't mess up something if I reopen it.

 

[Darkside19]

Video Link:

 

[Wesk]

Video Link:

This is video interference, use shielded cable.

 

[Darkside19]

This is video interference, use shielded cable.

So that's common with the gboy? and can you recommend one? do I need to change all cables from the vga wiring?

 

[Stitches]

Yeah you'd need to swap them all to see a benefit. Before that though, you could try just moving the wires further away from that inductor on the LCD driver board. It's probably the cause of most of your interference

 

[Darkside19]

Yeah you'd need to swap them all to see a benefit. Before that though, you could try just moving the wires further away from that inductor on the LCD driver board. It's probably the cause of most of your interference

oh damnit, I see what you mean, should I also desolder the green ground wire too and put it right next to the red 5V wire to the resistor C147 on the LCD driver board, to fix EMI?

 

[Shank]

It's interference. You fix it by using shielded wire for the Red, Green, and Blue lines. Sync lines do not need to be shielded. Twisting wire with a ground wire instead of shielding does not properly shield the wire. The antenna wires on the Wii's Wi-Fi module serve as a good source of thin shielded wire.

 

[Darkside19]

I really thank you guys for the tips. I will try it tomorrow :-)

 

[Darkside19]

Changed the cable position, that fixed the waves, thank you guys :-) now I can enjoy playing my beloved games on it

 

[Stitches]

Excellent. Using proper shielded wire will always be best, but sometimes you can get away with moving the wires away from "noisy" components like inductors, regs, and voltage supply wires to resolve most of the visible artefacts

 

[Darkside19]

Small Update: Fixed it now to 100% by using rubber tape+emi shield tape. Maybe an idea for someone else who don't want to solder new cables on :-)