Currently Being ModeratedMay 20, 2012 4:10 PM (in response to Anthony ÓDoibhailein)
What you describe certainly could be a failing graphics card.
The age of the Radeon 9600 XT (your graphics card) is starting to show, with failures becoming more and more frequently reported.
The heat from use degrades thermal compound, which, in turn, doesn't allow for the best cooling of the GPU.
This continual overheated condition eventually destroys componenets, resulting in visual anomalies, and finally, a black screen.
If you still have normal graphics for some time before the machine warms up, one might consider replacing the thermal compound on the card.
Similar, though a different heatsink, the process of doing so follows:
You should also try reseating the graphics card and reconnecting the monitor cables.
If the visual anomaliies occur from startup, start shopping eBay for used, Mac G5 compatible graphics cards.
I have listed all possible options here:
Currently Being ModeratedMay 21, 2012 1:48 AM (in response to japamac)
Hello, and thanks for your response.
On the basis of what you are saying I'll have a look for another graphics card and see if that resolves the issue. If I had the time I'd attempt the clean out but at the moment I don't.
Hope another graphics card resolves it.
All the best for now.
Currently Being ModeratedMay 21, 2012 2:46 AM (in response to Anthony ÓDoibhailein)
If you have another monitor, a quick check can confirm the diagnosis.
Another monitor; same problem; bad graphics card for sure.
Currently Being ModeratedMay 21, 2012 3:08 AM (in response to japamac)
Unfortunately I don't have another one to try out. As its an old ADC apple cinema display monitor 20" I'm using then I guess it could be a possible issue maybe?
I've managed to get a hold of a ATI Radeon X800XT for £89 with ADC & DVI outputs so I'll see how it goes when this arrives.
Thanks. Appreciate your input.
Currently Being ModeratedMay 21, 2012 3:53 AM (in response to Anthony ÓDoibhailein)
Not a bad price for a powerful card (much better than the 9600).
Likely the card, but would like to hear your results.
Currently Being ModeratedMay 21, 2012 4:04 AM (in response to japamac)
No bother. As soon as I have it I'll let you know.
All the best and have a good day.
Best wishes from Scotland
Currently Being ModeratedMay 21, 2012 3:12 PM (in response to japamac)
Just a wee bit of an update, the yellow has gone and now I see small vertical dashes around the corners of the active window. Different symptoms of the same condition?
I await the arrival of the other card to see if this makes a difference.
Currently Being ModeratedMay 21, 2012 3:16 PM (in response to Anthony ÓDoibhailein)
Different symptoms of the same condition?
Any similarities pictured here?
Currently Being ModeratedMay 22, 2012 3:30 AM (in response to japamac)
Nothing as extreme as any of those. Its really marginal. I reckon it could be in the areas where the shadows are generated by each window that there is the artifacts appearing.
I've woken today to find no sign of the artifacts either. Maybe the machine was just feeling like it needed some attention!
I'll add the other card anyway and see if I notice any great difference in performance as it is a better card than the one I have.
Again if I have any further news I'll let you know.
Currently Being ModeratedMay 22, 2012 4:01 AM (in response to Anthony ÓDoibhailein)
It could be age and heat related VRAM issues that you have detected early.
Speaking of which, after you have tested the X800XT to confirm function, you might consider protecting your investment with a refresh of the thermal compound.
The R420 GPU will appreciate it.
For the small price of a 4g. tube of Arctic Cooling MX-4 compound, you can increase cooling efficiency and be sure that the over 5 year old ineffective 2-4 year paste is replaced with a product that will last at least 8 years.
The tutorial that I did for the Radeon 9800 XT is pretty much the same as and should suffice for the X800XT: