KevinO
Experienced Member
My efforts to try to connect the video output of my B128 to the RGBI input of one of my other monitors has resulted in a completely different project. I was trying to connect it to a Magnavox CM8762. That monitor sort of worked, but the screen was fuzzy and there was some distortion. I opened it up to tweak the screen pot on the flyback to turn the brightness down, and found that it has the same flyback that I need for one of my 1084s. Since the 1084 is the more valuable monitor (having both RGBI and Analog RGB), I decided to sacrifice the Magnavox to transplant the flyback into my 1084. Got this done with no problems, and now my 1084S is now working again.
...sort of. Composite CVBS/LCA works fine, but nothing from either the analog or digital RGB ports. Then I remembered that I had stupidly shorted something way back when I had removed the original flyback. I had shorted something on the power supply to the digital RGBI board that sticks up from the main board. So I took that from the CM8762 as well. They really are almost the same monitor! No luck. Still no video. Then I found a blown resistor on the main board (R232 I think it was) and replaced that, and now I have RGBI video! I still have one more problem. With nothing plugged in and the switch in the RGB position, the whole screen is blue. Some component in the blue circuitry is still open (or shorted), I think. I was getting bleary-eyed, and it was too late to keep troubleshooting, but I'm going to tackle it again tomorrow night.
I don't know that I'm asking for help, exactly, but just sharing my adventures. I really enjoy actual electronics repair, even if I'm not particularly good at it!
...sort of. Composite CVBS/LCA works fine, but nothing from either the analog or digital RGB ports. Then I remembered that I had stupidly shorted something way back when I had removed the original flyback. I had shorted something on the power supply to the digital RGBI board that sticks up from the main board. So I took that from the CM8762 as well. They really are almost the same monitor! No luck. Still no video. Then I found a blown resistor on the main board (R232 I think it was) and replaced that, and now I have RGBI video! I still have one more problem. With nothing plugged in and the switch in the RGB position, the whole screen is blue. Some component in the blue circuitry is still open (or shorted), I think. I was getting bleary-eyed, and it was too late to keep troubleshooting, but I'm going to tackle it again tomorrow night.
I don't know that I'm asking for help, exactly, but just sharing my adventures. I really enjoy actual electronics repair, even if I'm not particularly good at it!