If you still have an Apple IIgs:

By this time, the floppy drive(s) will refuse to work.
The internal power supply needs a simple repair.
Built by Sony, I've diagnosed a the single faulty capacitor that all IIgs' have.
Inside the PS box on the white circuit board is one 
very small 1 microfarad cap.  It dies first.
Re-solder in a new one and the 12 volt supply becomes
stable (used for floppy drive I/O).

I happen to love those old RGB boxes too.

(-:  Chas.M.  :-)