Repairing/Restoring 48SX

[Sanjeev Visvanatha]

My 48sx keyboard needs replacing as the Enter key is physically broken, and ON does not register at all even if I press the bezel in the correct place.

So, I am looking at replacing the keyboard and swapping LCD for the black version. Some questions:

1. If I get a 48S, is the keyboard going to work with the PCB from my 48SX?
2. Are there any opening instructions for a 39GS? I have ordered one, but I am not sure how the unit opens up.