Unfortunately, there was a battery installed which was just about to start leaking, but luckily there was no oxidation inside yet.

Interior inspections:

Repairs:

Like many Macs from this era, this computer also had paper Rifa capacitors, which tend to blow up once they're dried out. Luckily, these are easily replaced with modern equivalents:

After this, it was safe to try powering it up:

Clean-up:

The inside needed a good cleaning so I decided to fully disassemble everything, here are some pictures fully cleaned:

Floppy refurbishment:

The floppy drive needed a full refurbishment:

After a full cleaning it still needed lubrication: