THE GREAT ISAIAH SCROLL (1QIsaa) can be consulted online with good, high resolution, color images. The site is published by the Dorot Foundation Dead Sea Scrolls Information and Study Center. (HT Gerald Rosenberg.)
Black and white images of the scroll with detailed textual analysis have been available online for a long time. Other PaleoJudaica posts on the Great Isaiah Scroll are here, here, here, here, and here.