when I put an HDMI cable into my monitor the screen is condensed. why?

ganndell5

New member
Previously I had a dvi cable connected from my home-made computer which was set to 1920 x 1080 resolution, and I switched it to HDMI, and now the screen is condensed and there is black lines down all 4 sides of my monitor (its still at 1920 x 1080). can anyone please help me?
 
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