Mac Pro display flickers with a white screen and then display closes

Hi,
The display on my Mac Pro started showing a white screen and flickering.
So I tried formating and re-installing 10.4.10. I am able to complete the installation of first DVD without flickering. But when after the restart after installation using first DVD then the flickering resumes.
Any idea what is the issue and how we can solve this issue.
The AHT test shows this code 4 SNS/1/40000001:ICAC. According to
http://support.apple.com/kb/TS2081?viewlocale=en_US the code should have a trailing number - but my report does not have any number. Is this error code fine? If no, can some one tell me what is the error in the system?
Thanks,
Ed
Message was edited by: esg123

Same symptoms here. We tried AHT on a good Mac Pro with the video card from the bad mac, and got the 4 SNS/1/40000001:ICAC error. Looks like a bad video card.
Here's another thread discussing the problem: http://discussions.info.apple.com/thread.jspa?threadID=2071334
Dave

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