I just bought a gen 2 ipad to use for work. It's main purpose was to read and navigate plans more efficiently while in my truck on a jobsite. I am currently using a laptop. Problem I am having is when I open PDF document the ipad starts flashing one plan at a time quickly until it finally rests on a dark screen with PDF title, PDF document and size (ie. 6.4 MB). How can I get this to work ? Most of my files come via text and this problem occurs whether I download or not.