No Console Message at startup (solved)

I have successfully installed 4.1.3 and it works over Webgui. But on startup, there is no info on console monitor displayed, ist is blank. The only message shortly displayed is the message "failed" in red color. This was not the case with version 2.x and 3.x. Any idea?

It is a monitor defect. Wit an other monitor console output is ok.