I would bet for a weak connection between Pseudo Saturn cartridge and your Saturn : after turning off the Saturn, please re-insert the cartridge, and ... pray it boots correctly after that 🙂 If this doesn't works, slightly lifting the cartridge after re-inserting it may help a little.
I tried both things, and some properties changed, like how it loaded the Saturn Menu loaded when I lifted it slightly... But still, no Pseudo Saturn...