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Performa 6200 desktop – vertical lines
Posted by: mpsanu on 2026-06-19 08:41:36 Hello everyone, My Power Mac Performa 6200 is showing dark vertical lines. I already tested it with another LCD monitor/cable and the problem remains. I did a full recap of all the aluminum electrolytic capacitors on the logic board and also on the power supply. I found some bad capacitors, but none were completely failed. I only saw signs of capacitor leakage in the power supply, on the 2200uF capacitors, but it was easy to clean and it seems to be working fine. Even so, the video problem stayed exactly the same. Apart from the video, the system works perfectly (it boots normally, chimes, and runs the system without issues). I noticed that an integrated circuit near the video connector (on the separate board on top) is getting quite hot. I'm not sure if this is normal operating temperature for it. My questions are: Is it worth checking the tantalum capacitors on the logic board and on the separate video board? Or should I look for something else (maybe related to the video chip or VRAM)? Any help or suggestions are welcome. I can take more photos if needed. Thank you!
Posted by: Durosity on 2026-06-19 11:15:16 it could be the connector from the motherboard to the rest of the machine.. maybe worth spraying some deoxit in to and giving it a bit of a clean?
Posted by: Byrd on 2026-06-19 16:24:36 Deep cleaning time particularly around the VRAM would be the next step. An ultrasonic clean could also help
Posted by: mpsanu on 2026-06-22 05:35:01 Deep cleaning time particularly around the VRAM would be the next step. An ultrasonic clean could also help I'll try cleaning it. It's easier than replacing a VRAM with "J" pins. (Someone on Facebook said the probability of it being the VRAM itself is quite high). However, I didn't see anything oxidized, except for some pins on the chip next to it, which must be the video DAC. It's visible in the photo.
Posted by: mpsanu on 2026-06-26 05:07:42 Unfortunately, cleaning didn't solve the problem. So all that's left for me to do is try replacing the VRAMs. It's going to take a while.
Posted by: croissantking on 2026-06-26 21:15:33 Yes seems possible one of the VRAM chips is bad, or maybe there’s a broken trace in that area.
Posted by: croissantking on 2026-06-26 21:26:24 How do the lines change as you lower the resolution and bit depth?
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