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 - Garbled Video Issue


Post Reply New Thread Subscribe

 
Thread Tools
danno321s

 
Member Since: May 15, 2007
Posts: 3
danno321s is on a distinguished road

danno321s is offline
Hi,

My Dad has an iMac G5 20", 1.8 Ghz, 1 GB RAM (no i-sight) that runs Panther 10.3.9 with all updates. He started to experience his desktop freezing for 10 seconds or so with the windows becoming blurred. Then on power up the gray screen would be all streaked with colors bouncing. I ran the full hardware test and it checked OK as it did not return any error code. So I wiped the HD and did a fresh install and same problems. If the iMac is booted into Safe Boot, the video problem goes away. Does Safe Boot disable advanced video chip features that may be the culprit? His S/N doesn't qualify for extended video warranty for earlier models.

TIA,
Danno
QUOTE Thanks
mark2c

 
Member Since: May 15, 2007
Location: NC
Posts: 10
mark2c is on a distinguished road
Mac Specs: iMac G5 20" 1.83Ghz iMac 2.16Ghz 24in. MacBook 2.0Ghz 20 Inch IMac 2.0 Core 2

mark2c is offline
I would have to say they are the exact symtoms for the caps blowing above the power supply on the logic board. One precise reason for the repair extention for the board and power supply. I have had it done on my G5 which qualified, but even the new logic board is showing the same capacitor bulging as the previous board. It has not started to show the same symptoms yet.
I would take a look at the caps. They are at the bottom of the board just above the power supply. They are electrolytic and have a metallic shrink wrap and an X pattern on the top. When they bulge they look like a baked bun when they should be flat topped. When they blow, they ooze yellow goo.You can't miss it.

Maybe you can build a solid case for the relapcement, but there are no guarantees.
QUOTE Thanks

Post Reply New Thread Subscribe


« G5 - 5200 resolution questions. | iMac 2.16 Vs 2.33 »
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
DV-Video MAC/PC Issue? (Need to convert imported video so that it is cross-platform) MrChris Movies and Video 6 03-07-2005 08:28 AM

All times are GMT -4. The time now is 05:01 PM.

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?