Build Your Own Arcade Controls Forum
Main => Monitor/Video Forum => Topic started by: nipsmg on December 04, 2018, 08:45:52 am
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I recently modded a TV set for RGB and am connecting to it using a video card and crt_emudriver. Yesterday I noticed some pretty severe noise and wavy lines on the picture. I had initially figured it was due to unshielded wiring used to mod the TV, and maybe the flyback was causing some issues. So I plugged an LCD monitor into the integrated graphics (separate video card) and saw the same exact pattern. The pattern persists on the LCD attached to integrated VGA when I completely disconnect the CRT.
Any idea what would cause that?
I took a video. You can see the noise somewhat, but it is much more pronounced in person.
https://youtu.be/bTT0G2w_Kow
Suggestions?
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Assuming we're not looking at what appear to be physical marks on the screen above and to the left of the windows logo in your vid...
I would guess at interference, and if the CRT is not only disconnected but powered down, it'll be power related. Do you have another powersupply you can try? Even a cheap, low powered one would be fine to try with your GPU unplugged.
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Can't really see anything in the vid. Almost certainly power related or a ground loop. Need to know more about exactly what your setup is.
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I'm 90% sure it's bad PSU. I'm able to alter and even elminate the noise by manipulating the cables coming out of the PSU. There's something bad happening there. Just ordered a new modular PSU (and some new VGA cables to be on the safe side), both will be here tomorrow.
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Quick update:
Confirmed. Bad PSU. Replaced with new PSU, picture clean and stable.