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chscag

 
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Member Since: Jan 23, 2008
Location: Fort Worth, Texas
Posts: 41,406
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Mac Specs: 27" iMac i5, 3.2 GHz, iPad 3, iPhone 5c, 3 iPods, Yosemite

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I've merged your two posts together as it makes no sense having them separate when they're related.

Getting any repairs done from someone who advertises on eBay is risky since you have no way of knowing what kind of work they do or if they warrant what they work on.

Since your graphics chipset is integrated on to the logic board, it's not possible to change it out without replacing the entire logic board. And repairing logic boards is best left to the techs at Apple or an authorized Apple repair service center.

The symptom you referred to in the link does look like it may be graphics related. If you're serious about repairing your G5 iMac, you may want to use an authorized Apple repair reseller such as PowerBook Medic. They have an 800 number you can call and speak live with a tech.

The best way to backup your iMac before repairing it is to use a cloning program such as "SuperDuper" or "Carbon Copy Cloner". Both can do the job and you won't lose any data.
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