New To Mac-Forums?

Welcome to our community! Join the discussion today by registering your FREE account. If you have any problems with the registration process, please contact us!

Get your questions answered by community gurus Advice and insight from world-class Apple enthusiasts Exclusive access to members-only contests, giveaways and deals

Join today!

 
Start a Discussion
 

Mac-Forums Brief

Subscribe to Mac-Forums Brief to receive special offers from Mac-Forums partners and sponsors

Join the conversation RSS
Apple Desktops Discussion of Apple's desktop machines including Mac Pro, iMac, Power Mac, and mini

iMac - G3 blueberry iMac 350MHz switching off problem


Post Reply New Thread Subscribe

 
Thread Tools
adrian.bryant

 
Member Since: Aug 08, 2008
Posts: 3
adrian.bryant is on a distinguished road

adrian.bryant is offline
I have a G3 blueberry iMac that unexpectedly turns itself off after it's been switched on for a while. Once it's turned itself off, the power button stays green and flickers. If I leave it for a while, it will power up again as normal. Please could someone explain what the problem could be? Thanks.
QUOTE Thanks
harryb2448

 
harryb2448's Avatar
 
Member Since: Nov 28, 2007
Location: Nambucca Heads Australia
Posts: 17,780
harryb2448 has a reputation beyond reputeharryb2448 has a reputation beyond reputeharryb2448 has a reputation beyond reputeharryb2448 has a reputation beyond reputeharryb2448 has a reputation beyond reputeharryb2448 has a reputation beyond reputeharryb2448 has a reputation beyond reputeharryb2448 has a reputation beyond reputeharryb2448 has a reputation beyond reputeharryb2448 has a reputation beyond reputeharryb2448 has a reputation beyond repute
Mac Specs: iMac i5 2.7GHz, 16GB memory, OS X.10

harryb2448 is offline
Sounds like you are having a hardware problem and perhaps in the power supply.
QUOTE Thanks
hughvane

 
hughvane's Avatar
 
Member Since: May 18, 2008
Location: Banks Peninsula, New Zealand
Posts: 3,263
hughvane is just really nicehughvane is just really nicehughvane is just really nicehughvane is just really nicehughvane is just really nice
Mac Specs: MacMini 2.4, 4 Gb, OS 10.9 and 10.6; MacBook 2.4, 2 Gb, OS 10.6.8

hughvane is offline
Quote:
Originally Posted by adrian.bryant View Post
I have a G3 blueberry iMac that unexpectedly turns itself off after it's been switched on for a while. Once it's turned itself off, the power button stays green and flickers. If I leave it for a while, it will power up again as normal. Please could someone explain what the problem could be? Thanks.
Couple of questions:
1. How long is "a while"? Is there an overheating issue? Your iMac may be shutting down temporarily to cool off. Check too that the air intake vents at the base of the iMac aren't clogged with dust, and that the air outlet vent is not blocked by something.
2. Are you using a UPS or surge protector? If so, check that the operational light on either unit is on and, if possible, test the power supply therefrom.
QUOTE Thanks
adrian.bryant

 
Member Since: Aug 08, 2008
Posts: 3
adrian.bryant is on a distinguished road

adrian.bryant is offline
Hello, Thanks for replying. The mac shuts down after several hours use. I think you are right that it is either an overheating issue or power supply. If I leave the iMac for say 5-10 minutes I can power it up again, and it works normally. So I think overheating is a strong possibility. When it turns itself off it briefly makes an unusual sound, after shut down. It sounds a little like Captain Kirk beaming down from the Starship Enterprise. Maybe he's stuck inside and that's the problem!!! The monitor screen has developed a slight tick every so often too. I am not using a UPS or surge protector.
QUOTE Thanks
harryb2448

 
harryb2448's Avatar
 
Member Since: Nov 28, 2007
Location: Nambucca Heads Australia
Posts: 17,780
harryb2448 has a reputation beyond reputeharryb2448 has a reputation beyond reputeharryb2448 has a reputation beyond reputeharryb2448 has a reputation beyond reputeharryb2448 has a reputation beyond reputeharryb2448 has a reputation beyond reputeharryb2448 has a reputation beyond reputeharryb2448 has a reputation beyond reputeharryb2448 has a reputation beyond reputeharryb2448 has a reputation beyond reputeharryb2448 has a reputation beyond repute
Mac Specs: iMac i5 2.7GHz, 16GB memory, OS X.10

harryb2448 is offline
Adrian it may be worth running Apple Harware Test over the machine. If you do not have a copy for iMac, v. 1.2.2, download from the link and drag the .dmg file to the left hand column in Disk Utility and burn on to a CD.

The CD will be bootable by holding down 'C' on startup:-

http://www.info.apple.com/support/aht.html

Struth I loved my iMac 350 with its 10GB HDD and CD-RW optical drive but they are fair cows to crack open and do any work on!
QUOTE Thanks
adrian.bryant

 
Member Since: Aug 08, 2008
Posts: 3
adrian.bryant is on a distinguished road

adrian.bryant is offline
I tried to run an Apple hardware test from the Mac OSX 10.3.9 disk that I am currently running on the iMac. It told me that my computer was incompatible with the Apple hardware test. Any other ideas on what I could try?
QUOTE Thanks

Post Reply New Thread Subscribe


« G5 tower fans running high unresponsive | G5 Dual 2.5 RAM capacity »
Thread Tools

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off
Forum Jump

Similar Threads
Thread
Thread Starter
Forum
Replies
Last Post
iMac GRAY Screen boot problem kokyaw Apple Desktops 10 06-24-2011 02:37 PM
iMac & Airport Extreme Problem... FabianMG Internet, Networking, and Wireless 1 03-28-2008 11:51 PM
Apple addresses Airport Problem (iMac and MacBook) Daddy Elmis Internet, Networking, and Wireless 1 01-05-2007 09:50 PM
Airport Problem in iMac 2.1ghz (isight) Drew_Ty Internet, Networking, and Wireless 0 12-17-2006 07:14 PM
Problem with Keyboard and iMAC Intel 20'' chidlebaugh Apple Desktops 3 03-17-2006 10:26 AM

All times are GMT -4. The time now is 01:20 AM.

Powered by vBulletin
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
X

Welcome to Mac-Forums.com

Create your username to jump into the discussion!

New members like you have made this community the ultimate source for your Mac since 2003!


(4 digit year)

Already a member?