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Alienware monitor problems

We are repairing an Alienware 7500RS.  During start-up, the monitor shows vertical green stripes.  We have swapped video cards but to no avail. Can anyone help?
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Muttertag
Asked:
Muttertag
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1 Solution
 
MereteCommented:
Anything in safemode?
Could be a heat issue.
Check If there is a setting stopping the fans from kicking in until a certain temp is reac
Download a tool to check your heat
SpeedFan
http://www.bleepingcomputer.com/download/speedfan/
how to
http://www.pcadvisor.co.uk/how-to/desktop-pc/3465136/how-check-your-cpu-temperature/

Open Hardware Monitor is a free open source software that monitors temperature sensors, fan speeds, voltages, load and clock speeds of a computer.
http://openhardwaremonitor.org/
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Davis McCarnOwnerCommented:
I take it you tried more than one monitor?
And, is it OK once it boots up?
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MuttertagAuthor Commented:
The vertical green lines appear almost immediately during boot-up.  We have tried different monitors.
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Davis McCarnOwnerCommented:
I asked if they went away after booting?
And, what version of Windows are you running?
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MuttertagAuthor Commented:
During boot up, the Alienware splash screen appears with a background looking like a bunch of white dashes as if the background is perforated. The post test is FF.  Then the vertical green lines appear on the monitor as the PC starts Windows 7.
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Davis McCarnOwnerCommented:
If you changed the video card and Windows appears to boot normally, you almost undoubtedly have bad communications with the PCI (express) slots.  I hate to say it; but, I think you need a new systemboard.
Try the old video card in another PC and, if it works, you'll know.
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MuttertagAuthor Commented:
Yes,  I think your right.  I have tryed 2 different cards.  I have a video card tester which shows the v. cards as working correctly.   The lines show before the P.O.S.T. is finished and through the booting process.  It is just baffling. Can't find the cause.
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MuttertagAuthor Commented:
Thank you.
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