Lizwiz wrote:Thank you for your help Lady JJ.
I'm still at a loss though ...
I've tried first putting in the Guide solution. The door remains sealed.
After that I put in the alternate solution which caused a red chest to appear. The door remains sealed.
Then I put in the Guide solution again and the door is still sealed.
So I tried it the other way round: first the alternate solution. Chest appears, door sealed.
Then the Guide solution. Door still sealed.
I could only assume that this was because I didn't have all the slabs, but that's a Catch 22 situation isn't it?

Hey, I have a couple suggestions that I think should help:
1. The stone slab will be there even when you can enter, so once you got the unlock core panel puzzle done, you should try opening it again.
2.

The 2 red circles here unlock at the same time. The one on the right was a door blocking the way before I finished the unlock core puzzle. If that door is gone on your game, the sealed door should be open now.
3. The puzzle solution might be put in wrong. It should make a beep when it's done right. The top 2 corners of the puzzle solution look fairly similar, so maybe they're backwards?
I checked the game files and the doors in the 2 red circles should be unlocked by the same event. If you still have issues, I can check your save file to make sure nothing has gone wrong, but I think it should be okay.
I hope one of these solutions helps
