Bruce wrote: > Hello, > > I was given an MDD to fix up. The MDD came with no hard drive, > no memory, and no PRAM battery. I took a hard drive, memory, > and a PRAM battery from a good working QS, and put it in the MDD > to try it out. The MDD booted and ran normally.
You should have quit mucking about at this point. > > I shut the MDD down, then rebooted, holding down the Command- > Option-P-R keys until the MDD chimed a 2nd time. After this, > the MDD acted exactly the same as before I did this. The [Command]+[Option]+[P]+[R] keys must be held down on a cold boot until the system chimes 3 times, then released to reset the NVRAM. Using Open Firmware to reset the NVRAM is the best way to reset it, and you performed that operation correctly. If you installed the PRAM battery backwards as regards polarity, you may have damaged the PMU chip. If you installed the PRAM battery observing correct polarity, but pressed the PMU switch too many times, or for too long, you may have drained the PRAM battery. Pull the PRAM battery, and check for 3.67V. If it does not measure at least 3.5V, replace it again with a new PRAM battery. There are three checks for the proper operation of the PRAM battery/NVRAM; 1) proper voltage, 3.67V, 2) system boots, 3) time and date remain correctly set between start-ups. Proper procedure to replace the PRAM battery is to remove the system power cord, all external devices/cables, and the PRAM battery, press the front panel power switch once and hold for a 10-15 seconds, then release the front panel power switch, wait TEN MINUTES. Replace the PRAM battery with a new PRAM battery, observing correct polarity, press the PMU switch ONCE, and once ONLY, releasing it immediately, wait TEN SECONDS before re-connecting the power cord and external devices/cables. >Once booted, the MDD acts normally. > > Suggestions anyone? Have you configured the System/Network Preferences pane to recognize your Internet connection? If not, do so. If you are not corrected to the Internet, check to make sure you have not set the system to obtain the correct Time and Date from an Internet time server. Also check that the Start--up Disk is set for the local drive, and the correct OS partition. Have you changed the password for the admin account? If so, reset the password by way of the OS DVD utilities. Make sure you have the proper PPC OS X 10.4.11 Combo update to install from. You could remove all the RAM, the AGP video card and all the PCI cards from the computer, and give the edge card connectors a good cleaning with a pencil eraser before re-installing them. Never hurts... Ross --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed Low End Mac's G3-5 List, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.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 unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/g3-5-list?hl=en Low End Mac RSS feed at feed://lowendmac.com/feed.xml -~----------~----~----~----~------~----~------~--~---
