I buy some old Dell E2215HV and I'm trying to connect to my new pc which has a dvi graphic card port. The message show "No VGA Cable, the display will go into power save mode in 5 minutes". I surely plug my VGA cable with DVI-D adapter. Some discussion said can fix that with change input source, so I'm trying change it from front button but I didn't see input source menu on osd. So how can I change input source if input source missing on osd.