Saturn Picture wobbling/wobbles

[chaoticjelly]

What causes Saturn picture wobbling/wobbles?

Is it the power supply?
Is this repairable?

What causes freezing on bootup?

Is it the mainboard/BIOS/some other component on the mainboard?
Is this repairable?

What causes "no disc in tray"?

Is it the laser lens (dead)?

Just a few questions I would LOVE to know the answer to!  :unsure: