One of my relatives gave me his PS3 Slim for repair, since I bought a reball kit a few weeks ago and he said I can try it...

I got my hands on a PS3 Slim (CECH-2004) with a defective drive for pretty much nothing. Apart from the drive, it worked...

So the right side button on my mousewheel is pretty much dead, only when I apply strong pressure it will sometimes notice...

@oldturkey03 like I mentioned, it's near the RSX, those are the only caps near the RSX's corners. https://imgur.com/GhI2dId I've looked at the PS3 fat schematics and they also have those two caps near the RSX, according to the schematics of the fat boards I found, those are both 100nF, 10V caps. To verify this I've ordered a new multimeter with the ability to measure capacity til 100nF, so I can check it against my other PS3 Slim.