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

Power Mac - Video problem


Post Reply New Thread Subscribe

 
Thread Tools
Lucid1

 
Member Since: Mar 01, 2008
Posts: 1
Lucid1 is on a distinguished road

Lucid1 is offline
I have a PowerMac G5 with dual 2.5Ghz processors and 3 Ghz of memory. I have had the computer for a few years and have had no problems with it until now.

I booted the computer and the fans were running at full speed. The computer was acting normal other than the fans for about 5 min. Then the computer went into what appeared to be sleep mode and then woke right back up again. It continued to go through this cycle (asleep, awake, asleep, awake) until I shut down. I then tried to reboot and the computer would come on (fans on, power light on, hard drives spinning) but the monitors would not come on. I then forced the mac to shut down and tried rebooting again. The same problem happened. I tried resetting the PMU and after plugging the power cable back into the tower the power light came on but the mac would not power up. I did not have to press the power button to get the power light to come on, just plugged the power cable in. Nothing comes on either, just the power light comes on. I tried holding the power button in to get the light to go off or to get the mac to boot but with no luck. I then decided to check the battery. I took it out and it is reading 3.689 volts so I put it back in. This time the computer booted up. It came up a bit slow but without any problems. That is until about 5 min. went by and the same problem started all over again. Fans kicked into high gear and the computer started cycling from sleep mode to waking up over and over all by itself. I shut down and tried rebooting and again the power light comes on, the hard drives spin and the fans kick on but no display. I found that if I wait about 20-30min. and reboot it will come up just fine but the issues start over again after about 5 min. or so.

I have made no changes to the system in many, many months and have not had any problems at all. The unit is not connected to the internet either. Any suggestion would be greatly appreciated! Thank you.
QUOTE Thanks

Post Reply New Thread Subscribe


« Power mac G4 keeps rebooting when switched off? | New iMacs »
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
ichat video problem jds670 OS X - Apps and Games 0 02-21-2007 10:04 PM
Video card problem causing startup and kernel panic problems? neonplanet Apple Desktops 0 11-02-2006 05:14 PM
Brand New PB 12" 2 HARD Crashes. Video Problem... jbsengineer Apple Notebooks 4 03-20-2005 02:01 AM

All times are GMT -4. The time now is 05:50 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?