Good afternoon. Usually out of scan range is a message your monitor displays when you try to run something in a resolution it doesn't support <ie 1600x1200 on a 15" monitor>. What resolutions are you trying, and what resolutions does your monitor support? Also, what res is your windows desktop at? Is it just in HL?
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Also, make sure windows has your CURRENT monitor setting enabled. Usually most of the time it could be a driver. Find the most current driver for your monitor, and delete and monitors that are still in your windows system settings..