If its a driver crash, check your Event Viewer under Applications or System to make sure its that. If its not there let us know as could be something else, PSU power, screen backlight failing. A few things tbh. But drivers are a good first step to check.
I doubt you need a new GPU unless its broken, can it still run games at all, are the black-outs the same frequency as when on desktop to videos to games?
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What is your power supply?
What was the previous graphic card?
Did you use the clean install method of installation?
Not sure on the Powersupply. It is the one that came with the unit.
IT did not have a previous video car. The AMD Radeon is what came with it the unit.
I did the search and download method.
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Youll need to take a look at your Power Suply box, note the Wattage and the Current on the 12 volt rails. This info is important as your new card may not be getting enough juice. I think this is what kingfish is trying to help you with.
You will also need to follow the like as well and clean install. Even with the search and download method, the driver needs to be what is called Clean Installed.
Post back your PSU info and try what kingfish' link guides you through.