On Apr 7, 2004, at 07:12 pm, [EMAIL PROTECTED] wrote:
At 01:43 PM -0400 04/07/2004, Mike wrote:Won't the system still boot provided everything else is in order without a PRAM battery and the little diagnostic circuit check that takes place and resulting bong sound. Or does the fact that it is starting out from a completely dead status with no power connected until everything is reassembled prevent this?
The power manager needs the trickle current from the battery to function. So, no battery juice = no heartbeat.
Trickle current for the Power Manager on all PCI PowerMacs is supplied from a +5v/GND rail on the power supply (as is also the casein ATX PCs) so no PRAM battery is required to fire a 9500, or other PCI PowerMac. I've been there and done it.
-- Mark Benson
This is what I had suspected. After all, I've heard many people who have experienced booting a computer that has remained plugged in to AC power but the PRAM battery is dead, resulting in a time warp back to 1956 and other lost settings. The fact that the settings are off must mean this circuitry involving memory of settings becomes completely drained of power until startup. But the machine boots and runs apparently, by many people's accounts in the past on this list.
When trouble-shooting RAM and continually removing the power, as in my case with my 9500, I think having a good PRAM battery is probably necessitated.
Mike
-- PCI-PowerMacs is sponsored by <http://lowendmac.com/> and...
Small Dog Electronics http://www.smalldog.com | Refurbished Drives | -- Sonnet & PowerLogix Upgrades - start at $169 | & CDRWs on Sale! |
Support Low End Mac <http://lowendmac.com/lists/support.html>
PCI-PowerMacs list info: <http://lowendmac.com/lists/pci-powermacs.shtml> --> AOL users, remove "mailto:"; Send list messages to: <mailto:[EMAIL PROTECTED]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive:<http://www.mail-archive.com/pci-powermacs%40mail.maclaunch.com/>
Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
