My MDD G4's also only shut down when I was not using them. But after a while they began to occasionally refuse to start. Got a glowing light in the start button when I pushed it but no start. This progressed to no starting at all. The shutting down on it's own was the beginning of the end.

I went through guilt trips. I thought maybe I had not kept the G4's clean enough and had overheated them. Ect. Then I found out the power supply in the MDD G4's have issues and it wasn't my fault.

I don't know of any way to check to see if it is a failing power supply but I certainly recommend that you back up your entire computer to an external hard drive. And start watching for a good used power supply.

=================
On Oct 7, 2010, at 5:42 PM, Stephen Conrad wrote:

On Thu, Oct 7, 2010 at 4:36 PM, James Morgan <[email protected]> wrote:
On my MDD G4's one of the early symptoms of the failing power supply was that the computer would just unexpectedly shut down.

Well, this only happens when I am not using it.
Any way to check (that does not involve paying someone)?

I am looking for a nice multi-tip power cord so I can plug in the other hub. Walmart used to sell them but the only ones they sell now are for use in your car, you plug them into your cigarette lighter.


==========================
On Oct 7, 2010, at 3:35 PM, Stephen Conrad wrote:

Mac: G4 Quicksilver (800 MHz)
1.5 GB SDRAM

3 HD, 1 CD-ROM
USB Ports have 5 USB sticks, a Memory Card and my Olmpus Digital Camera plugged into them (see below for detail) plus the KB

Back of the Mac has a port which has 1 card plus the Olypus. Also has a cord to a non-Powered Hub. This has a Powered Hub plugged into it. (I need a 5V cord to power this thing and cannot find one)
Powered Hub has 2 USB Sticks plugged into it,

KP has the Memory Card and my Logitech USB Mouse

PROBLEM: First off, this NEVER happens when I use the machine

When I am away it randomly shuts down.
It is NOT set to sleep under Energy Saver

Under System Preferences I see nothing about shutting down

Now, I blew out (with me providing the air) what little dust was inside (I will get a new can of air today) and under the tower.

What else can I do? I have not had this problem until recently (never with the Smurf or previous machines, some of which had many more HDs hooked up (externally but same power strip)
--
Steve Conrad
Henrietta, MO 64036

"The time has come for mankind to grow up and leave its cradle behind; to go forth and claim our place in outer space."
                   - Capt. Henry Gloval


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You received this message because you are a member of G-Group, 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]
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Steve Conrad
Henrietta, MO 64036

"The time has come for mankind to grow up and leave its cradle behind; to go forth and claim our place in outer space."
                   - Capt. Henry Gloval


(\__/)
(='.'=)
(")_(")
Help Bunny Take Over The World!

--
You received this message because you are a member of G-Group, 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]
For more options, visit this group at http://groups.google.com/ group/g3-5-list

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You received this message because you are a member of G-Group, 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]
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