I have found a Portable Backlit without hard disk with a full memory expansion.

It has these sympthoms:

- without battery it boots well but after booting I get this message "No battery reserve power remains. The Macintosh will go to sleep within 10 seconds to preserve contents of memory. Good night", and after 10 seconds it shuts-up. In the upper left there is a battery symbol.

- the screen is not backlit. Plugging power, resetting Mac and unplugging power many times, sometimes I have managed to have the screen perfectly lit.

I have the Macintosh Powerbook AC Adapter M56527 (APS-46E) Input AC 100-240V 0.55A 50/60Hz Output DC 7.5V 3.0A.

Thanks in advance.