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G5 1.6 freezes with certain applications

9157 Views 46 Replies Latest reply: Feb 1, 2010 7:11 AM by Saxlix RSS
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Saxlix Calculating status...
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Oct 27, 2009 7:53 AM
I bought a used G5 1.6 about 6 months ago and am struggling to find a solution to my problem - the computer consistently freezes when using certain programs. The biggest culprits are browsers (Safari, Firefox, Opera all create this situation, with Plug-Ins activated and without), but it also happens when using Excel X and SigmaChess 6.1.

My guess is that it is a hardware issue, but a TechTools scan shows all hardware passes inspection. The previous owner replaced the stock graphics card with an ATI Radeon 9600, so I think this might be the culprit - I'll try to find another graphics card to test this theory.

I have done the following to try to try to rectify the situation (none have worked):
•installed new RAM (Kingston - built specifically for G5 1.6)
•swapped RAM in all locations and used RAM two at a time
•removed and reseated video card
•repaired permissions with DiskUtility
•created new directories with DiskWarrior
•started in Safe mode
•updated firmware
•zeroed HD and installed Leopard, then Tiger (both affected equally)
•pulled all periphials
•tried all USB port combinations for keyboard and mouse
•plugged mouse directly into computer USB port
•turned off QuartzExtreme
•reset PRAM, PMU, NVRAM
•created new user account

Any ideas on what to do next? I'm pulling my hair out trying to fix the problem. Thanks!
G5 1.6, Mac OS X (10.4.11), 3 gb RAM
  • BDAqua Level 10 Level 10 (114,755 points)
    Currently Being Moderated
    Oct 27, 2009 12:42 PM (in response to Saxlix)
    Hi Saxlix, and a warm welcome to the forums!

    You've certainly done great work so far, the only thing I might add is to open Console in Utilities, observe that for clues when it freezes. Activity Monitor sorted on CPU% may also help.
  • jagered Level 1 Level 1 (20 points)
    Currently Being Moderated
    Oct 31, 2009 7:20 AM (in response to Saxlix)
    holy crap?!?! where did you buy this machine?

    you have certainly done alot to it... i can't believe that a fresh install on a zeroed hdd STILL gave you the problems?!?! is your install from a retail version or a downloaded version from the web? -- just asking because i have tried upgrading my o/s using a torrent i found and had issues, so i just went out and bought it.

    i am trying to learn more and more about macs seeing that i have been a pc freak for many years! i love these machines... good luck!

    note: got an external you can convert into a startup disc?? try it on a different drive and see if the problems persist... may be a bad hdd.
     G5 DC 2.0 --- Glad to be a convert!, Mac OS X (10.5.6), Smokin' G5! -- 2.0GHz w/5.5G RAM - 640G + 300G hdds - ATI X1900GT - 20.1" LCD ws
  • The hatter Level 9 Level 9 (58,560 points)
    Currently Being Moderated
    Oct 31, 2009 8:12 AM (in response to Saxlix)
    Tested the battery or just swap for a new one to see if that resolves problem?
    Mac Pro 8800GT 10K VelociRaptor, Mac OS X (10.6.1), Windows 7 i7 3.2GHz GTX 260-216
  • The hatter Level 9 Level 9 (58,560 points)
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    Oct 31, 2009 8:47 AM (in response to Saxlix)
    Swap old battery for new if you don't have the appropriate meter.

    http://www.macsales.com carries one or Radio Shack

    http://www.apple.com/support/powermac/ links to all manuals, specs, how-to, articles, etc.
    Mac Pro 8800GT 10K VelociRaptor, Mac OS X (10.6.1), Windows 7 i7 3.2GHz GTX 260-216
  • The hatter Level 9 Level 9 (58,560 points)
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    Nov 1, 2009 7:43 AM (in response to Saxlix)
    Kernel panic = hardware

    Apple Hardware Test? I'm not sure I'd rely on TechTool (Deluxe or Pro).

    Lemonaide?
    Mac Pro 8800GT 10K VelociRaptor, Mac OS X (10.6.1), Windows 7 i7 3.2GHz GTX 260-216
  • The hatter Level 9 Level 9 (58,560 points)
    Currently Being Moderated
    Nov 1, 2009 8:35 AM (in response to Saxlix)
    Lemonade, a refreshing summer drink. (I misspelled, again!)
    http://en.wikipedia.org/wiki/Lemonade

    American 'slang' that if you have a lemon (lemon is name for faulty product, cars made on Monday tended to have higher failure rates, so often termed "lemon"), then if you have lemons, turn it into lemonade.

    Usually you can get a copy of AHT from Apple, they will want the serial number of the computer to know which version and such. Not sure why there wouldn't be support.
    Mac Pro 8800GT 10K VelociRaptor, Mac OS X (10.6.1), Windows 7 i7 3.2GHz GTX 260-216
  • IIe Calculating status...
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    Nov 2, 2009 7:22 PM (in response to Saxlix)
    what firmware version is installed ? should be 5.1.5f2

    Power Mac G5 Uniprocessor 5.1.5 f2 Firmware Update
    http://support.apple.com/kb/DL548

    Message was edited by: IIe
    PowerPC G5 1,6 GHz, Mac OS X (10.5.8), 4 Gb RAM - GeForce 6800 GT DDL - 2 x 500 Gb HD
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