Ati Radeon Hd 5770 Pro 5,1 Password Entry Prompt

I believe my graphics card problem is unrelated to EFI, however.

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Intel model). After posting at discussions.apple.com, I was encouraged to run Apple Hardware Test to test for any hardware faults.

Unfortunately, ever since I replaced my old graphics card with a new one (The nVidia GeForce GT 8800 for Mac, which had worked great for years, burnt out, and Apple Corp.

The Mac Pro is fully updated, running OS X Snow Leopard, 10.6.7.

It has 6 GB of RAM -- plenty for my purposes -- and I run system maintenance routines weekly to correct permissions, etc.

In preparation to diagnose my fan issue, I went ahead and flashed the PRAM, and reset the System Management Controller (SMC) for good measure.

I first noticed a change in the boot process after installing the 5770 graphics card.

As everyone knows, after pressing the Macs power button, a chime is heard.

After a moment or two of darkness, the grey screen Apple logo appear, followed eventually by Finder.

Ever since I installed the 5770 however, the screen remains blank until JUST before OS X has fully loaded (sometime AFTER the grey Apple logo would ordinarily appear on-screen, but before Finder opens up).

Everything else seems to work just fine.until I tried booting (while pressing the d key) from my system disc, to run Apple Hardware Test.

As best as I can tell, everything loads up normally, except that I cant see it.

Im fairly sure the computer is not frozen because it responds to key combinations like control-command-option-eject, the keyboard shortcut for fast shutdown.

I have experimented with various other start-up key combinations (like c, or command-option-p-r to flash the PRAM, etc.), and have confirmed (just by listening to the sounds that the Mac Pro makes while its booting, for lack of any visual confirmation) that those low-level boot processes are in fact working properly.

System Profiler identifies my current boot ROM version to be MP11.005C.B08.

A quick Google search confirms that this version is associated with Mac Pros which have been upgraded with the ATI Radeon HD 5770 graphics card.

So now Im now stuck without the ability to run ANY kind of pre-boot diagnostics, etc.

Ati Radeon Hd 5770 Pro 5,1 Password Entry Prompt

Booting to the EFI password entry prompt as it was supposed to, but failing to route that low-level process to the video card -- all I could see is the blank screen).

So, dear reader, thank you for having the patience to read about my problem.

Not being a qualified technician, I understand that many of my assumptions may be speculative, but I believe that Ive been thorough so far.

Fortunately, this problem is not debilitating for me right now, but I can foresee having troubles in the future (like when it comes time to upgrade the OS to Lion).

If the ATIApple engineers havent written a firmwareboot ROM fix (assuming that is whats needed) by then, Perhaps it will finally be time to buy a new computer: Please do not hesitate to re-post this on any other forum where you believe it might be relevant.

Thanks in advance for any help you can offer -kapok Mac Pro 1,1, 6 GB RAM, OS X 10.6.7, ATI Radeon HD 5770 GPU.

I followed your instructions carefully, and my firmware password has been reset.

Ati Radeon Hd 5770 For Mac Pro 5,1