I have an Odyssey Neo G9 that I was working on for a separate issue. After removing the motherboard and putting it back a few times I noticed that the lights on the display have stopped turning on altogether. I was able to determine that when the middle section for the backlights is disconnected, then the left and right side turn on, indicating that the fault is obviously in that area.
After closely inspecting the mainboard I noticed that on the back side of it a few capacitors have been partially moved, one fully knocked off. I replaced the missing one with a new cap with the same value as the closest capacitor to it from the same circuit, however even after replacements the backlights still would not work.
After checking further, I noticed that one cap directly in front of the connector has only a 4.5ohm resistance, however this is only the case when the backlight connector is plugged in. For testing purposes I did remove the cap but it made no difference. I was able to find the specific line on the cable that had a 4.5ohm resistance and put a piece of tape over it. This made it so that the other two sections of the backlight would stay on even if the middle is plugged in, however there is still no light whatsoever from the middle area.
I'm thinking that the backside being messed up caused one of the LEDs to die. I was hoping that blocking that partially shorted signal would allow the rest of them to come on but that does not seem to be the case. Is this a completely lost cause or is there something I can try? I'm thinking one of the possibilities is that the replacement cap I put on is not the right value. Also maybe more lines could be blocked off on the cable? I've tested with a different cable as well. Also the actual backlight itself is not accessible unfortunately.
After closely inspecting the mainboard I noticed that on the back side of it a few capacitors have been partially moved, one fully knocked off. I replaced the missing one with a new cap with the same value as the closest capacitor to it from the same circuit, however even after replacements the backlights still would not work.
After checking further, I noticed that one cap directly in front of the connector has only a 4.5ohm resistance, however this is only the case when the backlight connector is plugged in. For testing purposes I did remove the cap but it made no difference. I was able to find the specific line on the cable that had a 4.5ohm resistance and put a piece of tape over it. This made it so that the other two sections of the backlight would stay on even if the middle is plugged in, however there is still no light whatsoever from the middle area.
I'm thinking that the backside being messed up caused one of the LEDs to die. I was hoping that blocking that partially shorted signal would allow the rest of them to come on but that does not seem to be the case. Is this a completely lost cause or is there something I can try? I'm thinking one of the possibilities is that the replacement cap I put on is not the right value. Also maybe more lines could be blocked off on the cable? I've tested with a different cable as well. Also the actual backlight itself is not accessible unfortunately.
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