My PS2 acts weird...
I don't know what version it is but I got it for Christmas in either 2002 or 2003. It's been working great ever since, I've never opened it or customized it, but for some disks it makes a scratching noise (only when it's loading). The disc stays in the same condition, and it doesn't affect my gameplay at all So, I figured...why not question what it was? Can anyone tell me why it's making this noise?
Old age. Probably the disc tray has slipped down, or the laser's playing up in some way. Might even just be the laser struggling to read certain discs & clicking away so much it sounds like scratching.