Laptop Video Issue

I have an HP Pavilion zd8000 laptop with Windows XP. The problem I am having is that it loses video. What I mean is that when I boot the system I see the HP logo and the options to go into setup etc. The the Windows splash screen comes up and does its thing. After that the screen goes blank briefly and then I can see the backlight come on and the mouse pointer will appear on the screen. Then I will hear the windows chimes and then the screen will be blank and there will be no video. The HDD and the fans are all still running but there is nothing on the screen. I have replaced the RAM and also performed a repair install of Windows with no success.
I can boot into Safe Mode with no problem so I am wondering if this is a driver issue.

Please advise.

Thank you!

Robert
Robert EhingerIT specialistAsked:
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jamietonerCommented:
Boot into safe mode uninstall the video driver restart into normal mode and install the latest video driver.
Raymond PengSystems EngineerCommented:
I would recommend downloading the video drivers from HP here:

http://h20000.www2.hp.com/bizsupport/TechSupport/ProductList.jsp?lang=en&cc=us&taskId=135&prodTypeId=321957&prodSeriesId=434660

did it just stop working all of a sudden?  Also check out any latest updates / service packs from windows
arnoldCommented:
Make sure you are not redirecting the display to the db15 external/additional monitor.
I think there is an Fn key combo to toggle the display direction if an external monitor hook up is not an option.
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Robert EhingerIT specialistAuthor Commented:
OK, here is the deal - I first checked to make sure I wasn't redirecting the display to an external monitor because that would have been the simplest solution but that was not the case. So I completely uninstalled the driver and the reinstalled it. Initially it was OK but the screen resolution was 640x480 and the color quality was low. When I changed the resolutio and clicked apply I lost the video. I then uninstalled the driver again and the checked the default drive Windows loaded and the screen resolution is 1024x768 and the color quality is highest. Is I look in Device Manager the video adapter shows up - ATI MOBILITY RADEON X600 - but is has the proverbial yellow dot with the ! in the center of it indicating a "corrupt or missing driver."
jamietonerCommented:
Its possible the video card is failing and is unable to produce the higher resolution.
arnoldCommented:
You could try to see whether it is the hardware or something within the windows environment.
Get a linux liveCD knoppix., ubuntu, centos and boot the system using the bootable CD
See whether the graphical issues you have remain with the other OS booted.

Do not let windows update install the drivers, go to the HP site and download their recommended driver for the display and see whether it resolves the issue.
It could be the screen itself begining to fail.
Raymond PengSystems EngineerCommented:
are there any onboard hardware diagnostics you can run? (usually in your BIOS options)
SureFirCommented:
Boot into safe mode and wipe the drivers for the video card. Then boot normally and allow windows to install provisionary drivers. Once this is complete it should be possible to run at a low cost. Next just download the recommended drivers from HP and you should be good to go.
Robert EhingerIT specialistAuthor Commented:
I don't see any diagnostics except for the HDD. The drivers I tried that caused me problems  were from the HP site - not Windows. The video card is producing the higher resolution now without using the HP driver.
Robert EhingerIT specialistAuthor Commented:
Booting into safe mode and wiping out the drivers for the video card is how I got to where I am now with this system. I booted normally and let windows install the provisional drivers. But downloading the recommended drivers from HP did not work. That is when I ran into problems.
arnoldCommented:
There are times that the LCD goes bad, I.e. the circuitry that drives the display goes haywire.  You should try to confirm whether it is a hardware issue and narrow down the possibility.
You coul eliminate the video controller as the problem, by using the external interface with a monitor if the issues follows to the external, the issue is with the graphics controller and you should take the thing to the store if it is still under warrantee.
Etc.

Do the drivers that are install allow for the larger resolution or are your screen resolution limited?
Raymond PengSystems EngineerCommented:
that's interesting - was the machine functioning properly for a while and it just errored out recently?  You may want to setup a restore point using the system restore feature in system properties for future safekeeping.
nobusCommented:
test if you get a good display on an external monitor first
post results
Robert EhingerIT specialistAuthor Commented:
External monitor works fine.
arnoldCommented:
The issue is then likely the Circuitry on the LCD.
If the system is still under warranty, take it in and let them check it out.
If you are comfortable and do not have to be mobile, you could use the system with the external monitor attached.
A replacement LCD depending where you are can run you between 90-150.

And is a rather straight forward process to switch.
There are instructions available on the net. three or so screws under the battery. Then 4 or 2 or three screws 6 screws on the  display

Doing thing cautiously noting all screws and their location, the max it could take is a couple of hours.  View the different youtube videos on LCD replacement. Prior to starting.
Robert EhingerIT specialistAuthor Commented:
I reinstalled Windows and now all is well.

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Raymond PengSystems EngineerCommented:
Interesting - so it appears to be a software issue.  Thanks for getting back to us and good to hear you're up and running.
nobusCommented:
i suspect it will come back - but let's hope for you it stays ok
sounds like the different testing and handling caused a bad contact to disppear imo
Robert EhingerIT specialistAuthor Commented:
After trying all the experts' suggestions with none solving the problem I reinstalled Windows as a last resort.
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