A reminder to remove the PRAM battery from your Mac, or replace it with a new one every few years to prevent this from happening. This was a Macintosh IIvx with its
APPLE Powerbook G4 15 A1046 PRAM Batterie + Board 820-1-820-1484-A
PRAM Puffer Batterie 922-7190 Original MacBook Pro 15 Zoll A1150 2006 - gebrauchte Originalersatzteile für Macs
Mac mini Mitte 2011 PRAM Batterie austauschen - iFixit Reparaturanleitung