5600XT - 2nd Monitor flickers in Dual View

Problem Description: I am running on dual monitor mode using two Samsung Syncmaster 171s monitors.  After 20 minutes of the system being up and running the second monitor has started switching on and off every 10 seconds or so, the on and off becomes more rapid if I open a video editing suite like Adobe premiere pro, any ideas as to the problem.....?
many thanks
Shaun

Hi redturnover
Could be a bad or loose connection, the connection method, the adapter, the cable or the Refresh Rate.
Disconnect everything and reconnect it in the following order:
1. Connect the cable to the Acer
2. Connect the Adapter to the cable
3. Connect the Adapter to the iMac
Also tie up and/or support the cable and adapter so that it is not pulling or putting un-due strain on the iMac's video output port.
Then go to: System Preferences > Displays and check the Refresh Rate to make sure that it is within the Acer Spec's of 49 to 75Hz. I believe you should be able to select either 60 or 75Hz, if your using either a DVI or HDMI connection.
Dennis

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