I take it you have an SSD?  The Dell logo not showing up upon booting is becoming quite normal with today's fast and faster SSD's.  It's not hurting anything. [URL] 
Hi, My dell optilex doesn't shows the dell boot logo at start up. I'm able to get tho the bios or one time boot menu the only problem is I'm unable to see the dell boot logo on my screen I'm using a dell 1909wb 1440p 75hz monitor and the optiplex is 5040 connection is via HDMI. PLEASE HELP. Thanking in anticipation.
Dell boot logo not show up