Let me tell you pal, i've got 2 Sega Saturns with Pseudo Kai and Modchip
If they insta take your OG games and NOT your backups, even if you burn them at low speeds or anything. Then your CD Laser is dead (or dying)
You either buy a new CD Laser, or re-calibrate it with a multimeter. You need to take off the cover, take off the laser and find the little screw behind the CD Len.
You need to give it a little push to the right...or left, depends on your multimeter until it hits...1.77 aprox, thats what i was told, done and it ended up working. Its not permanent tho.