So I bought a cheap snes RGB cable a while back and the picture had clipping on bright scenes with way too much contrast and when I tried it on an LCD it actually looked like a checkered image. So anyway I modified the cable myself and followed this http://members.optusnet.com.au/eviltim/gamescart/snespal.png I had to use 100ohm resistors instead of 75ohm and a 200ohm instead of a 180ohm. I also used pin 7 instead of pin 9 because I heared sync on luma gives a better image. Anyway I have audio buzzing at bright scenes even though I chained ground to every ground section on the scart and also it won't switch to AV automatically like they're supposed to. I checked all the wires and everything seems to look ok. Just no auto switch and buzzing in the audio. Any suggestions on what could be wrong? Literally followed that exactly except for pin 7 (luma) and the slightly different resistors I listed. Thanks. Ok so I found out my cable hadn't actually got 12v but actually had 2 GND cables. I changed it so the cable was 12v and just chained pin 5 and 6 together as they're both ground. Auto switch is switching as soon as I plug the SNES in now though even if it's powered off but it's setting the screen to 4:3 which is what I want. I don't mind too much about that switching thing when it's plugged in but I am still getting audio buzz.