On my G5 mac at work, I am getting - don't know what to call it - looks like extraneous matrix type code around prompt windows and in applications. Sometimes I will get large shapes of colors, yellows, magentas, cyans. Anyone else experience this?

On my G5 mac at work, I am getting - don't know what to call it - looks like extraneous matrix type code around prompt windows and in applications. Sometimes I will get large shapes of colors, yellows, magentas, cyans. Anyone else experience this?
I will attach a recent screen shot of a print window I opened and the extra code is above and below the window. There are matrix type blocks of code and then lines under the window. I get this all the time and it is getting worse.
Any help to get rid of it would be appreciated.
Thanks
TatteredSkull

It's likely the Video card, or possibly heat.
At the Apple Icon at top left>About this Mac.
Then click on More Info>Hardware and report this upto *but not including the Serial#*...
Hardware Overview:
Machine Name: Power Mac G5 Quad
Machine Model: PowerMac11,2
CPU Type: PowerPC G5 (1.1)
Number Of CPUs: 4
CPU Speed: 2.5 GHz
L2 Cache (per CPU): 1 MB
Memory: 10 GB
Bus Speed: 1.25 GHz
Boot ROM Version: 5.2.7f1
Get Temperature Monitor to see if it's heat related...
http://www.macupdate.com/info.php/id/12381/temperature-monitor
iStat Menus...
http://bjango.com/mac/istatmenus/
And/or iStat Pro...
http://www.islayer.com/apps/istatpro/
If you have any temps in the 70°C/160°F range, that's likely it.

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