Just went to the site (on my iMac) and selected the Domino 500 manual. I just got a blank gray screen with the buttons I described at the bottom when you bring the cursor down there. So, I closed that window and tried downloading the TS55 supplemental manual. Same thing, except after about a minute, I did get the manual on the screen with the buttons at the bottom of the page to save as a pdf. Then I tried the Domino manual again and it actually downloaded also, but it took about a minute also. I don't have a very good internet connection so, in my case, I think that it just took awhile because of the size of the pdf file. When your screen goes black, do you have those buttons at the bottom of the screen which appear when the cursor is down there. If so, I think it may be downloading in the background and just taking awhile. A lot depends on the internet connection your have and how fast it is. I find I have to be very patient as mine is very slow; inexpensive but slow.