Having trouble with the EIP on the overhead display. When I start the combine the display on the top lights up but it does not display anything just has the black led look. The other buttons on the top work but nothing displays on it. If I shift the lower display to what is selected on top it works down there but the top display just stays lit up but no display. I have checked the EIP fuse in the fuse panel and the other fuse back on the engine but they were both fine. When I did unhook the EIP fuse in the cab, then the upper display goes out so I know that it is being powered but could just the display be bad or is there something else wrong. Any help would be great Thanks