Artifacts on screen with VGA cable

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Meathax
shadow
Posts: 7

Artifacts on screen with VGA cable

Post#1 » Fri Feb 03, 2023 1:11 am

Just got a Japan Dreamcast, put it into a new shell and put in a DreamPSU, pluged it all back together, and I am getting these static type artifacts all over the screen though a VGA cable (first time I've turned it on). Checked all the connections inside they all seem fine.

Tried it though a scaler and straight into a projector, makes no difference. Is this caused by the VGA cable or something else?
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-drez01-
Tank Jr.
Posts: 344

Re: Artifacts on screen with VGA cable

Post#2 » Fri Feb 03, 2023 8:16 am

I could be wrong but it might be the PSU.. try the original and see if that helps

Meathax
shadow
Posts: 7

Re: Artifacts on screen with VGA cable

Post#3 » Mon Feb 06, 2023 9:37 pm

So theres no static through normal composite cable, works fine, tried 2 VGA cables and they both have this static, any idea how to fix??

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Ian Micheal
Developer
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Re: Artifacts on screen with VGA cable

Post#4 » Mon Feb 06, 2023 10:19 pm

Cables must be not shielded and you got interferences in your house or around it.. Never had a problem with cheapest china cable zero static .. Guess you lucked out ..

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deluxux
Black Mesa
Posts: 1400

Re: Artifacts on screen with VGA cable

Post#5 » Mon Feb 06, 2023 11:34 pm

If you have an old house you might have some grounding issues that can do weird stuff, a power conditioner might be a solution https://www.amazon.com/Furman-SS6B-Powe ... 0002D017M/

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SEGA RPG FAN
Developer
Posts: 601

Re: Artifacts on screen with VGA cable

Post#6 » Tue Feb 07, 2023 12:15 pm

You should try a different VGA cable. Some of those are so poorly made. I had a cheap one where the ground wasn't connected and gave bad interference. If the interference rolls up or down the screen, I would definitely suspect a bad ground.
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cbx
shadow
Posts: 12

Re: Artifacts on screen with VGA cable

Post#7 » Tue Feb 07, 2023 2:43 pm

A video might be more helpful to explain what's the cause.

Meathax
shadow
Posts: 7

Re: Artifacts on screen with VGA cable

Post#8 » Fri Feb 10, 2023 8:37 am

fixed it with a better power adapter

belzebu
noob
Posts: 1

Re: Artifacts on screen with VGA cable

Post#9 » Fri Mar 08, 2024 2:56 am

Hi, i have the same problem too, can you indicate what power adapter chose for fix it ?
thank a lot.
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