Problem Help Identifying Red and Green Input Wires (To diagnose no red)

Robotgreg

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Hi

Hoping one of you might be able to give some advice to my mate he's got a MAME cab with a computer CRT monitor in it. The tube is Hitachi but he's not sure if the chassis is too or something else. There's no red on the monitor and he wanted to swap red and green wires to help diagnose that there is no red currently on the monitor, but not sure which wire is which.WhatsApp Image 2026-01-11 at 15.30.09(5).jpegWhatsApp Image 2026-01-11 at 15.30.09(4).jpegWhatsApp Image 2026-01-11 at 15.30.09(3).jpegWhatsApp Image 2026-01-11 at 15.30.09(2).jpegWhatsApp Image 2026-01-11 at 15.30.09(1).jpegWhatsApp Image 2026-01-11 at 15.30.09.jpeg .

I’ve attached some pictures. He's happy if you contact him direct to discuss or provide any assistance (WA phone number supplied by PM to save posting on public forum).
 
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