What is Wrong With this PS2?

The PS2 model in question is a NTSC-J SCPH-50000 PS2 with a GH-029 motherboard. Console was warranty sticker sealed so never modded.

Symptoms:

1. Without a memory card, audio and movie disks appear in the browser without an icon.
2. Without a memory card, going into the tracks of an audio CD each track appears without an icon.
   
3. With a memory card disks appear as a memory card icon. Movie DVD icon is exactly the same as a memory card icon. CD discs are a memory card icon but are...

What is Wrong With this PS2?