I installed the 8MB of RAM I bought for it and now it does this, after displaying vertical lines for a while. Reset sometimes makes it change between vertical lines and this. I've also installed a new PRAM battery.
So I've replaced every capacitor and cleaned everything as best I could, still no luck, same issue. I haven't replaced the diodes but I'm not suspecting them as the voltages are now a perfect 5v and 12v. Could this be bad RAM? I have attached an image with what is displays after recapping.