If your vintage Mac is suddenly living in 1956 (or 1904, 1984, etc.) every time you turn it on, the PRAM battery is likely dead. 2. The Danger Component (Soldered vs. Holder)
Later Power Macintosh models often require a working PRAM battery to function properly. MACINTOSH PRAM BATTERY
Enthusiasts often carefully cut or desolder these old batteries to remove them before they destroy the logic board. 3. "Not User-Serviceable" (Technically) If your vintage Mac is suddenly living in
A leaking battery can leak hazardous electrolyte onto the motherboard, potentially destroying the computer. Holder) Later Power Macintosh models often require a
If you're working on a specific model, I can tell you if its PRAM battery is or in a holder . Do you know the model of your Macintosh? Are you trying to replace a dead one?
For anyone working with old Macs, the first step is often to "recap" the board and deal with the PRAM battery.