68kMLA Classic Interface

This is a version of the 68kMLA forums for viewing on your favorite old mac. Visitors on modern platforms may prefer the main site.

Click here to select a new forum.
Macintosh Portable
Posted by: Juliet Elysa on 2015-04-06 20:07:36
Undervoltage lockout? I didn't realize that was a thing... but guess it makes sense. Would explain why I've read about some old Macs giving a Sad Mac when they're started with not enough power.

Posted by: techknight on 2015-04-07 11:56:53
Thats not the same thing, your comparing apples to oranges there. 

Undervoltage lockout is designed into the circuitry of the macintosh portable. After it falls below a certain point, the window comparator latches and releases the 5.2V logic voltage from the rest of the system. It will not power on. 

Posted by: mactjaap on 2015-04-07 14:03:32
My main concern for now is this:

First I would like to know if the motherboard is working. Then worry about the rest. Could there be some live with 6V 1000mAh or should I really buy a 2000 one?

Posted by: techknight on 2015-04-07 15:21:08
Yes, but it wont start. Soon as you try, itll kick in the overcurrent on the 1A adapter. 

< 2