Satellite Pro L450D - Slight ripple effect on external monitor

I am hoping someone can help me. Have just bought a new Satellite Pro L450D and also bought a separate lcd screen (Viewsonic) to use with the laptop.
When using the lcd screen there is a slight ripple effect across the background when you look at the screen which is not nice on the eyes. Its not the screen that has a problem as I have tried it on other pcs/laptops and its fine. Have also tried another screen on the laptop and the same problem occurs. However, this problem does not occur of the laptop screen itself.
Does anyone have any idea how I can solve this problem.
Thank you
Sam

Hi
It seems that the native resolution of this screen is 1920 x 1080.
I use the same resolution on my external wide screen monitor.
But I have connected the external screen to my notebook using the DVI cable.
I tried a HDMI cable but the picture on the external screen was not clear usign1920 x 1080. I have no idea why.
Anyway I have tried the external monitors DVI port and the picture was perfect!
Seems your monitor supports only RGB analog port.
In order to view real HD videos, picture you would need an HDMI or DVI port.
Of course its possible to use an RGB analog port as well, but there are differences in picture quality.

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It sounds like you've covered most of the practical steps found in this Knowledge Base article:
Apple computers: Troubleshooting issues with video on internal or external displays
http://support.apple.com/kb/ht1573#1
No video or no signal, image distortion, "snow," or flickering
Check connections
When using an external display be sure to check the following:
If you're using an Apple notebook, confirm the AC power cable or adapter is securely connected to the computer and the cable providing power to the display is also secure. It is always good to have your notebook connected to AC power when an external display is in use.
Confirm display adapters are fully seated in their respective connections and that they are supported models and for the computer and display. Refer to these articles to assist you with adapter compatibility and further configuration information:
Monitor and Display Adapter Table
About Mini DisplayPort to HDMI adapters
Apple Mini DisplayPort adapters: Frequently asked questions (FAQ)
Thunderbolt ports and displays: Frequently asked questions (FAQ)
Remove all display cable extenders, KVM switches, or other like devices and retest to determine if the issue is resolved.
Try unplugging the video adapter or cable and then plug it back in.
If more than one video adapter is in use (or "daisy-chained"), troubleshoot by using only one adapter.
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Reset the system
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Restart your computer.
The article does offer some additional links and recommendations as well:
These articles may offer additional assistance and information about displays and video adapters:
Apple Portables: How to use your computer in closed lid mode with an external display
Apple Cinema Display (30-inch DVI) has 1280 x 800 as the maximum available resolution
Mac Pro (Early 2009), Mac Pro (Mid 2010): Supported display configurations
For assistance with Retina displays, please see Frequently asked questions about using a Retina display.
If you tried all of these steps for your display and the video issues persist, contact Apple technical support or take your Apple computer to the nearest Apple Store or Apple Authorized Service Provider (AASP) for diagnosis. If you plan to visit an Apple Retail Store, make a reservation at the Genius Bar using http://www.apple.com/retail/geniusbar/ (available in some countries only).
Note: Diagnostic fees may apply for issues not covered under warranty or the AppleCare Protection Plan (APP).
Thanks for reaching out to Apple Support Communities.
Cheers,
Pedro.

Satellite Pro L450D - Slight ripple effect on external monitor

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