Currently Being ModeratedMay 26, 2012 10:16 PM (in response to eric_herts)
I am not sure what you are trying to do. Do you..
1. Connect the iMac to the mac pro and access it's drives in target disk mode?
2. Connect the iMac to the mac pro with the intent of attempting to use the displays conencted to it.
The reason for the weird questions is that you would only use video connections (vga, hdmi, dvi) for video and the mac pro cannot handle video input that way. Those are only video out possibilities for the mac pro. For target disk mode you need a data connection, e.g., using a firewire connection.
Currently Being ModeratedMay 27, 2012 1:57 PM (in response to The hatter)
Ok, so I've reset the SMC (twice) and also pressed the other two reset buttons on the logic board (not actually shure what they do!)
I've tried using both sets of fbdimms in both a & b slots individually
And i dont have the original discs anymore.
Itsjust odd that through all this the display hasnt shown a thing, not even recieved any signal. I know the GPU works and i've tried with a HD4870 just in case.
Currently Being ModeratedMay 27, 2012 2:14 PM (in response to eric_herts)
Safe Mode uses a simple display driver. [Shift at Startup], but takes several minutes to come up, and requires your password to login.
Startup Manager [Option at Startup] uses the simplest of everything. It is all in ROM, and draws an icon for each potential boot Volume, then waits for you to decide.Mac Pro (Early 2009), Mac OS X (10.6.8), & Server, PPC, & AppleTalk Printers
Currently Being ModeratedMay 27, 2012 2:34 PM (in response to Grant Bennet-Alder)
I have tried safe mode throughout the aforementioned processes but I dont get how a simple video driver would change things, when the only DVI socket is on the video card, wouldn't that force the mac to use the 4850/ 4870 i have plugged in? Also, I have tried the GPUs in different PCIe slots.
I tried startup manager several times before opening this question. Even when I run Target Disk Mode the firewire "screensaver" doesn't come up.
I really can't find any cause for the problem!
Currently Being ModeratedMay 27, 2012 2:46 PM (in response to eric_herts)
If you cannot get the Option key/Startup Manager to draw a screen you have a Hardware problem.
Remove ALL the Hard Drives and try again, on the assumption that something on a drive is messing up your Mac.
Are you getting a Chime?Mac Pro (Early 2009), Mac OS X (10.6.8), & Server, PPC, & AppleTalk Printers
Currently Being ModeratedMay 27, 2012 3:19 PM (in response to Grant Bennet-Alder)
I tried to start the startup manager with no HDDs in with no luck. I also only have one fbdimm plugged in on board A, everything else is out. But I have tried other configirations.
Yes, it chimes every time.
Currently Being ModeratedMay 27, 2012 4:18 PM (in response to eric_herts)
I didn't mention: before I knew I had this problem (i was using target disk mode for a couple weeks before i tried to boot the mac pro) something fell from the RAM area of the LOBO to the bottom of the case. It was a thin peice of metal about 15mm long and 1mm thick and about 3 or 4 wide it curved at the edges like this
I'm still not sure where its from and i took everything but the cpus, heatsinks and optical drives out! But i dont know why that slither would cause the mac to prevent the screen showing!? (BTW it's not the same-shaped piece of metal which holds in the LOBO battery).
Currently Being ModeratedMay 28, 2012 6:47 AM (in response to eric_herts)
I'm now going to erase my Time Machine hard drive in Target Disk Mode (using my iMac) and try to re-install Snow Leopard - first trying to boot using the Mac Pro, if that fails I'll install it via TDM - as I really don't want to touch my main HDD. There's so much stuff I really can't loose!
I'll report back...
Currently Being ModeratedSep 12, 2012 10:44 AM (in response to eric_herts)
I still have my problems as mentioned above.
I have taken all the RAM out and the chime still plays and the mac starts up. It doesn't give me a RAM error/ beep. It's as if it doesn't need the RAM!?
I took it to Apple and they said I need a new board. But this mac pro starts up and runs the OS just fine (I have to hold the power button for 10 seconds to shut it down) it also runs Target Disk Mode and runs the install DVD. So I think it must be something else.
I am replacing the battery as it looks dented in a few days but until then does anyone have any suggestions to help/ try something?
Currently Being ModeratedSep 12, 2012 12:21 PM (in response to eric_herts)
Whoa there, sparky !!!
Is there something you aren't mentioning?
Since there has never been a Mac Pro 4850 and you have mentioned this number twice I would like to ask...what aren't you telling us?
Did this computer work fine until one day it quit? Or did you buy/inherit/find it broken or in an unknown state?
Any GPU used in a Mac Pro needs to have EFI on it to do this basic debugging stuff. While PC WIndows BIOS cards can be used if the system is A-OK and gets to desktop, it is basically impossible to use them on a system with issues.
So, if the 4870 has a DVI and a MDP port it is real Apple one and SHOULD work.
If that card died and you have tried replacing it with a WIndows/PC 4850, then you have broken the scientific rule about only changing one thing.
Ideally you would have another Mac Pro to test your GPU in and another KNOWN GOOD GPU to test in your Mac Pro. The EFI thing greatly complicates things, unfortunately. Even a "Mac Pro" video card won't necessarily work if it is for "the other" series of Mac Pro. Ther have been in effect, 2 different Mac Pros as far as video cards go. EFI32 and EFI64. ATI/AMD cards have been largely unaffected by this but Nvidia cards MUST be for right series.
More Like This
- Retrieving data ...
- This solved my question - 10 points
- This helped me - 5 points