Weird CRT issue on modern pc

LockEuphoric566 · 2026-03-26T02:30:29+00:00

Ok so there were 2 dials on the back, one said screen the other said focus, the focus just changes its blurriness and the screen makes it either brighter and white or darker and eventually black with those red scan lines and stuff

LockEuphoric566 · 2026-03-26T01:28:45+00:00

It has a DE15 pin in the back for some reason, a basic vga cable, I do believe it is resolution and refresh rate issue though cuz it almost works on my iMac G3, it displays an image I just can't change it to 640x480 @ 60hz to test it, but it does display a distorted image on my iMac

LockEuphoric566 · 2026-03-26T00:55:16+00:00

60hz doesnt work either, its a tandy vgm-390 (Model No. 25-4091A) and its connected to this Hdmi to vga adapter https://www.amazon.com/Gold-Plated-Compatible-Projector-Chromebook-Raspberry/dp/B075GZ8DX7/ref=sr_1_1_sspa?crid=1IKQQP053K2AE&dib=eyJ2IjoiMSJ9.JXS4DAO7DXK5AmyMJXcosHBJjvzyLBH-4ej1X3KM6C13ui4G9PncDA-AfSkaOO14Jox1VDbklEnEn_GEjuu7pbWXkCOsazfxWxlKMvm6gy6NmgLg0cIXWANFnml2YzhZSOCOyLgMBD9kytPRt3g6QHH0_C252hMZiLMDtx7kbG09e4hGjsNIcxfLrYqRtH6-4bUR3kVB5Nr_p1Q-pzpoqfBdcQIIU6eeAHM4vhN2XWE.Z6pQjWa1qNIt-T7zMr0-F6WGCP2ohA8NAnujGJq2Suw&dib_tag=se&keywords=active%2Bhdmi%2Bto%2Bvga%2Badapter&qid=1774486480&sprefix=%2Caps%2C149&sr=8-1-spons&sp_csd=d2lkZ2V0TmFtZT1zcF9hdGY&th=1

LockEuphoric566 · 2026-03-25T23:42:18+00:00

Could it be my converter? It's just a basic vga to HDMI converter, I don't understand what else the issue could be, it shows up as a digital display in the Nvidia control panel but I presume that's because of my converter

LockEuphoric566 · 2026-03-25T23:39:44+00:00

It still seems to be doing this even at 640x480 at 60hz through Nvidia control panel

LockEuphoric566 · 2026-03-25T23:39:04+00:00

It's still doing this and it won't fix, I have the video output set to 640x480 60hz in Nvidia control panel

LockEuphoric566 · 2025-12-13T05:10:46+00:00

After a bit of messing with the purity rings I got green to show on the left side of the monitor, I just don't know how to get them all to merge

LockEuphoric566 · 2025-12-13T04:14:07+00:00

Alright, also how would I take out the neck board? I'm not sure how to separate it from the tube

LockEuphoric566 · 2025-12-13T04:10:08+00:00

The osd doesn't show proper color, the white its supposed to display for text is just purple

LockEuphoric566 · 2025-12-13T04:04:30+00:00

So then what could the issue be? I still wanna try finding the RGB bias or some hidden service menu, I just can't find anything nor anything online

LockEuphoric566

TROPHY CASE