BAMT locking half way through boot

[batman, not crabman]

So I'm having issues with Windows 7 (https://bitcointalk.org/index.php?topic=191631.msg1984541#msg1984541) and want to run BAMT.  I have had it working before when I only had 2 cards, but switched back to Windows as I couldn't get the hash rates up.
Now when I insert the BAMT USB for the first time the launch menu comes up and it starts to boot but when it is gets to just past the .../ssh bit when the boot text comes up, then the screen goes black and it stops responding.  I can't read what loads after ssh causing it to crash as it's too quick.  I have tried several USB keys, including the one that used to work a few weeks ago.

I'm using BAMT 0.5c and Win32 Disk Imager.  I have 4 6950s and a GB 990 FXA UD3.

I am aware there are boot issues with the GB boards, but I think my issue is slightly different.  As I understand it most of them wouldn't boot BAMT at all (not even the launch menu)

Thanks

[mitak64]

BAMT is known to have problems booting on GB mainboards.
There is a workaround using another USB stick with a bootloader, it has been posted in the BAMT support thread:
https://bitcointalk.org/index.php?topic=28967.0

What I did was, clone the USB stick to a HDD using Ghost, but make sure to go in Options - Image/Tape - use "Image All"
Works fine on my GB boards.

[batman, not crabman]

Installed to hdd using clonezilla live cd, exactly the same problem.  It gets half way through booting then goes blank.
Same problem with plop bootloader on a separate USB key. Plop loads fine.

AAAHHH!!!!! 

[Zanatos666]

Just a suggestion, because I know my BAMT installation on one of my systems got a little hosed when first attempting to update CGMiner, but why not just try a clean install and start from the beginning?

[batman, not crabman]

Ok it seems that it's the graphics cards - if I only have one plugged in (at x16) it boots fine.

Windows has been stable for almost 24h now, so I may not need BAMT after all.

If I ever go back to BAMT I'll try booting with 1 card, running the updates then booting with more cards.

Thanks for the suggestions.

[Zanatos666]

Ok it seems that it's the graphics cards - if I only have one plugged in (at x16) it boots fine.

Windows has been stable for almost 24h now, so I may not need BAMT after all.

If I ever go back to BAMT I'll try booting with 1 card, running the updates then booting with more cards.

Thanks for the suggestions.

That would do it too. If you have a bad GPU, it could cause loading issues.  Or if you have a bad PCI-E slot that could do it as well.  Could be a power issue.  It could be a number of things.  All the fun that comes with running these things.  Good luck.