<font face="Arial, Verdana">I had the same problem and I solved it in the following way. </font>
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<font face="Arial, Verdana">First a bit of background about my setup. </font><font face="Arial, Verdana">My computer that I use to connect to my Delta printer is a Lenovo T61 (actually Frankenpad). The graphic chip in the laptop is GMA965. Instead of using the standard graphic driver that comes with Windows 7 x64 I tried to use a modded Intel graphic driver as it delivers better performance (Chell v1.8b). I had the same problems with Repetier Host v1.6.2, with the new graphic driver the 3D view was showing as a black area. The same issue is described in the following thread: </font>https://forum.repetier.com/discussion/1226/3d-view-only-showing-a-black-screen. At that moment I kept the old graphic driver (from Windows 7) in order to be able to use Repetier Host on my machine.
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<font face="Arial, Verdana">I installed the new version of Repetier Host v2.0 and I had a white area in 3D view. My conclusion is that the Intel modded driver installed on the machine is causing the problem. The solve the problem you need to:</font>
<font face="Arial, Verdana">1. go to http://trixarian.co.za/forum/showthread.php?tid=1 and in the first post there is a link for MESA OpenGL Software Renderer.</font>
<font face="Arial, Verdana">2. download the MESA OpenGL and unzip it. Inside there are some files opengl .dll for x86 and x64. Copy the corresponding version of the file to the folder where Repetier Host v2.0 is installed.</font>
<font face="Arial, Verdana">3. start Repetier Host and everything should work fine, the 3D view area should be shown correctly. </font>
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<font face="Arial, Verdana">Probably this solution works also for the old version Repetier Host v1.6.2, but I did not test it.</font>