Only half screen being used

Hewlett-packard / Compaq presario cq50 note...
July 23, 2010 at 15:22:14
Specs: Microsoft Windows Vista Home Premium, 1.9 GHz / 1789 MB
Hi, I recently unplugged my laptop from an old monitor i had lying around to find it will only use about half of the laptops screen. Rebooting doesn't help, it will go half as soon as it goes to the login screen. I looked at the resolution, its the same as it always was. I unplugged the cord from my laptop, closed the lid and opened it again, and found it was like this. It works perfectly on the other monitor.
Here's a picture of the problem:

Not sure what other info is needed, but here are the specs for the computer:

Manufacturer: Hewlett-packard
Model: Compaq presario cq50 notebook pc
OS: Microsoft Windows Vista Home Premium
CPU/Ram: 1.9 GHz / 1789 MB
Video Card: NVIDIA GeForce 8200M G
Sound Card: Conexant High Definition SmartAudio 221

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July 23, 2010 at 15:32:41
u can solve this problem simply by reinstalling video driver or change to correct resolution.

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July 23, 2010 at 16:24:07
Nope, doesn't work.
Reinstalled the drivers but it still was only using part of the screen. Tried to change the resolution(it was on 1024, the same as it always was) and it faded the screen in from black as usual, but only this time the screen didnt completly fade in(some of the black lines were still there) and the screen was whitish with blurred colours from the background showing through.

The screen on the laptop jumps and gets flickery lines occasionally, but it doesn't happen if i use the external monitor... guessing a trip to the repair shop is in order?

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July 23, 2010 at 16:27:18
You may have had the screen set to span over both screens. That requires an odd resolution as kuwese mentioned. Try resetting the resolution to the native resolution @60Hz.

The Presario CQ50 features a 15.4-inch wide-screen LCD display with a 1,280x800 native resolution.

If you don't have that resolution available then you may need to update the graphics drivers.

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Related Solutions

July 23, 2010 at 16:29:27
Try rolling back the graphics drivers to what was in use prior to this problem. Find that option in the advanced settings for your graphics.

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July 23, 2010 at 16:48:04
I upgraded the drivers, rolling them back didn't work either...
If the laptop is put to sleep, the cord is removed from the other display(not trying to dual screen, the laptop monitor is completely black at the moment) it gives this sickly looking screen upon wakeup:

Not that great with computers, i can update software and perform system restore, but beyond that am confused.

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July 23, 2010 at 16:52:20
With the resolution on the laptops lcg. 1024 is the highest number it will go to, same with the nvida control panel.
I remember it used to go higher. The old monitor is showing the ability to go above that, even with its normal resolution at 800.

Switched over to the laptop screen again... wiggling tthe lid up and down a bit shows the bluured colours and sometimes actual desktop flash acroos the screen for a split second before going to the half showing blurred screen again. Could it be a loose connection between something in the laptop screen?

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July 23, 2010 at 17:12:31
Right click an empty spot on your desktop. Choose screen resolution> Advanced settings> Properties> driver> uninstall. Follow the prompts. Then install the correct driver for the adapter you have.

These instructions are for Windows 7. Hopefully they are the same for Vista.

Before doing that be sure to have the latest driver for your display already accessible.

For best results you should always run your screen resolution at the native resolution, which is 1280x800.

Get the correct drivers for your computer at the link below.

If you unplugged the monitor while under power you MAY have damaged the GPU. Does the display look OK when reconnecting the external monitor?

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July 23, 2010 at 17:28:30
Yeah, I was having issues with it not coming ot of hibernation properly, the screen would stay black. Fixed the problem a few times before, but the usual fixes wouldn't work last time, so I dragged out an old monitor to use.
The display was fine before the monitor was connected.

I'll try the uninstall tomorrow morning, getting kind of late here. Thanks for the uninstall instructions =)
Have a copy of the new drivers saved on a usb for now.

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