systemax pc wont load os past logon screen

systemax ventura tower pc.  windows xp pro

wont load os after you get to logon screen.  video goes black then.  tried save mode and computer works and will losd so far.  did a system restore back a month.  restarted and same problem occoured.

check and reseated all memory and graphics card.

gets to where you choose user and then goes black.

thanks
GeorgeidpAsked:
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nobusConnect With a Mentor Commented:
try running sfc, or even a repair install :
http://www.updatexp.com/scannow-sfc.html                        SFC use in XP
http://www.michaelstevenstech.com/XPrepairinstall.htm            Repair install  XP
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lancecurwensvilleConnect With a Mentor Commented:
Does the screen simply go black or does it stop putting a signal to the monitor?  There is a virus variant that can cause this behavior.  Please see the below link for a description and suggested resolution:  http://www.techiechips.com/windows-vista-windows-xp-blank-screen-after-login-version-2/
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GeorgeidpAuthor Commented:
the screen goes black and no signal to monitor.
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lancecurwensvilleConnect With a Mentor Commented:
It may be an issue with your video card driver.  If you can get to safemode, you can try rolling back video driver from the device manager or downloading the newest drivers from the manufacturer's website and installing them from here.  Should this not work, Nobus's suggestion of running and sfc or repair install will be the next logical step.
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nobusCommented:
what about sfc?  did you run it?
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GeorgeidpAuthor Commented:
update:

sfc would not run      sfc /scannow   at the command box

unit does start in safe mode with f8 key.   last known comfiguration does not do anything.  used system restore and took it back a month, same thing.      tried the dvi side of the graphics card and it does not work on a dvi monitor.

reseated all memory and connections included graphics card.

now i am backing up the files before i go any further.

i am thinking of getting another graphics card same  type.

thanks
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GeorgeidpAuthor Commented:
i am going to log on as administrator and try to run it again.  the first time it just flashed and nothing happened.
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nobusCommented:
that seems like a corrupt OS to me - did you try the repair install also?
and no malware??  that can obstruct everything too..
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GeorgeidpAuthor Commented:
ordering graphics card before proceeding with the othere suggestions i received.  will now soon, if graphics card does not work we will use the windows install.

thanks
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