Q: macpro boot problem
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Sep 28, 2016 1:44 AMby lllaass,HelpfulLikely a graphics card especially if yo have the original card still installed.
However
- Try resetting the SMC and NVRAM/PRAM
Intel-based Macs: Resetting the System Management Controller (SMC)
https://support.apple.com/en-us/HT201295
https://support.apple.com/en-us/HT204063
- Try starting in Safe Mode
OS X: What is Safe Boot, Safe Mode?
https://support.apple.com/en-us/HT201262
- Boot to Recovery and repair the startup disk
OS X: About OS X Recovery - Apple Support
https://support.apple.com/en-us/HT201314
- If it is repairable reinstall the OSX
How to reinstall OS X on your Mac - Apple Support
https://support.apple.com/en-us/HT204904
- If you do not have a backup use disk utility to restore the internal disk to an external disk so you can try to recover data.
Then format the startup disk and do a fresh install of OSX
For selecting a replacement graphics card if necessary see:
User Tip: Mac Pro silver tower (2006-2012) Replacement Graphics cards
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Sep 28, 2016 1:26 AMby Budkor,Thanks for your reply.
My question is, if it is the problem of the graphics card (nvidia gt7300), how could it display the Apple logo and the circular movement when powered on?
This gt7300 had problem before, but resurrected by baked in the oven for 11 minutes. It worked great for 2 months, then this problem happened last week.
The thing is, that it totally cuts off the video signal just after the Apple logo with the circular movement display, I am wondering if it is problem with the OS hard drives? What do you think?
Anyways I will try to reset NVRAM and Cmos clock etc, and see how it goes.
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Sep 29, 2016 2:43 AMby Budkor,I tried all above, but nothing worked.
I was able to boot into Single User Mode - non graphic Unix mode.
This seems like the osx hard drive is ok.
As you suggested, the graphics card seems to have gone off.
NVidia gt7300 is a really bad product in reliability. Having said that, it could be
due to the age, maybe about 10 year old?
Should last longer than that, I would have thought.
I am still using a radio made in 1980s without a problem.
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Sep 29, 2016 5:22 AMby lllaass,Yes, those graphics cards do tend to fail with time.
You can try baking the card
http://lifehacker.com/5823227/save-dying-video-cards-with-a-quick-bake-in-the-ov en
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Sep 30, 2016 1:46 AMby Budkor,That Gt7300 had been already resurrected by baking in the oven this July.
It worked great for about 2 months, and died again.
I am wondering if another baking in the oven would be feasible or it could
damage the graphic chips and other parts?
If all fails, then I might go for the Nvidia Quartro FX 4500.
Although I have no faith in Nvidia gpu, it seems only option for the Macpro 2.1
How do you distinguish between the FX4500 for Macpro and PC?
Or do they work on both Macpro and PC?
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Sep 30, 2016 7:16 AMby lllaass,If not a Mac flashed card you will not get a boot screen so you can't use special startups where you have to see the screen like Recovery, boot manager (boot with Option key depressed).
Mac flashed card typically cost more that PC cards and some have a switch to switch between Mac and PC.
I would try baking, nothing to lose
