On Jun 27, 11:56 pm, poopoopoopoo <[email protected]> wrote: > I picked up a very clean Mac Plus with all the trimmings - 40mb CMS
> I did a bit more housecleaning before I reassembled it. It booted > right up but after awhile now it randomly reboots. I am beginning to > suspect bad RAM. Most likely the power supply is marginal and every time an event draws a little too much power the voltage dips below the level that will support the CPU, and it resets. See this document for details: <http://68kmla.org/files/> In brief, you'll want to measure the 5V supply with a voltmeter and if low, measure the 12V supply (they're linked rather than individually regulated). If they're both low, then you can adjust the internal pot. to raise the 12V back up to nominal and get the 5V back up as well. If the 12V is nominal and 5V is low then some components need replacing. If adjusting the pot. won't bring the voltage back up to nominal, then some components need replacing. Jeff Walther -- ----- You received this message because you are a member of the Vintage Macs group. The list FAQ is at http://lowendmac.com/lists/vintagemacs.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to [email protected] To leave this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/vintage-macs Support for older Macs: http://lowendmac.com/services/
