Power Save Issues

Hi, I have an
APPLE MAC PRO (3,1) 2.8GHZ (8 CORE) 12GB 640GB ATI 2600XT (10,000) 10.9 Mavericks. Recently when booting up, the monitor/machine goes into power save mode and the screen goes black. I have tried 2 different monitors and still get the same result. i have tried booting up in safe mode but it starts t show the progress bar and the goes into power save mode, I've zapped the PRAM and reset the SMC, but it continues to do the same. HELP!!

Maybe the 2600 XT card.

Hi, was wondering if it was the graphics board, however just booted up holding down the S key and it came to life, however when running techtool pro i noticed it's not seeing DIMM riser A? This is the nearest I've had to it running in a week! Sorry it is seeing Riser A but says it's empty, dodgy chip maybe or duff riser?

Well it sounds like you could be headed in the right direction. I would start playing with the memory sticks - removing them then adding them back. See what happens. Hopefully it is just a bad stick of memory.

Lisa

As Lisa says change them all about and hopefully it will be a single module which can be replaced. The memory risers, and rarely the cages, also can go on the blink but are usually available on eBay.


http://www.ebay.com/itm/Genuine-App...2008-630-8751-820-2178-922-8492-/371754597095

Hi all, thanks for your help but unfortunately it isn't he RAM or risers! I've managed to boot up for 10 minutes after re-seating them and today all are functioning correctly. then it just goes back in to power save mode. Soon after it goes into PS mode it sounds like something spinning down. I have now got it in target mode on my powerbook and it appears to be still running OK. Any suggestions?

Failing graphics card? If it is working in target mode I guess my next move would be to replace the graphics card.

And how do you know it is in power save mode? Is the power switch doing its dim in and out thing? (Not sure what to call it. :Blushing: )

Lisa

lclev said:

And how do you know it is in power save mode? Is the power switch doing its dim in and out thing? (Not sure what to call it. :Blushing: )

Lisa

Click to expand...

I call it "glowing"

Hi Lisa, thanks for the assist, after reading your reply I have come to the conclusion that it is the monitor going into PS mode not the Mac, I get a no signal message that flashes up on the screen just before it goes black. The Mac is on as the light on the front is a steady bright white. I have reseated the 2600XT an now have no messages coming up on screen at all, all I can hear and see is the fan in the 2600XT spinning up and down every couple of minutes. i take I need a new graphics card?

It does sound like that is a definite possibility. Replacing the graphics card would be my choice.

Lisa

To all, thank you for your help, it turned out to be the Graphics Card, now replaced and life is back to normal!!

Applemalc said:

To all, thank you for your help, it turned out to be the Graphics Card, now replaced and life is back to normal!!

Click to expand...

Good deal...great to hear it. The graphics card is much easier to replace on an old Mac Pro!

- Nick