Question about Apple Power Mac G4 Desktop

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I have a G4 PowerMac Sawtooth which was given to me, it has an OWC 1 GHZ. PowerPC CPU processor board with the gold colored heatsink and single fan. It has 1GB of PC-133 RAM and the latest firmware installed and two IDE Drives, and OSX 10.5.6. But I can't use it. The G4 chimes but video never comes up unless I hold down the internal MB reset button, and then it loses the decade, year, date, time, and other info. Then video works one time until the set is shut off. I've put a new battery in, no change. I've tried five different ATI, and Radion 7500 AGP and Apple Rage II PCI cards nothing is defective, but nothing gives video after the chime. One log file stated something about a cache failure, but I never had the original G4 / 350 MHZ. CPU card to see if it is the OWC CPU board cache that is at fault. For the last year and a half it has just been sitting here while I use my older G3 / 450 MHZ with 640MB of PC-100 RAM running OSX 10.4.11 which gets slower and slower after an hour or so, until the twerling cursor just stays on continuously... What does my G4 need to function properly???

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thx1136542

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It is possible you have a power supply failure. My MDD was doing the same thing unless I reset the PMU. There is a tutorial here on checking the PS - D275729F-09DA-4FBB-96B3-BEEEB2C04619.html It for a MDD, but I would think it would be useful for your situation.
Do you have an Intuos tablet connected? The drivers for that might be causing the problem and should be updated to the newest driver available

Posted on May 11, 2013

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KenKaBob

KenKaBob

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SOURCE: ATI Rage 128 Pro ADC 16MB AGP Video Card

Hello Burnolid,
Well, yes, if you have an AGP PowerMac G4 then any AGP video card will FIT into that AGP port.... The question is to know if that card is Mac Compatible ?
Where did you get the card ? Did you get it our of another mac ? or from someone who got it out of a Mac, then yes, it should be compatible with any Mac with a AGP port.

Posted on Apr 02, 2009

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