My dell monitors will not function as secondary monitors for my lenovo X1.
With another X1 they perform ok. All monitors (I have tested 5), fail in the same way, they go into "Entering power save" mode on power up, or connection to the X1. All cables and monitors have been checked with other computer and another X1.
The X1 detects the existence of the monitor (shows it as secondary monitor in windows control panel), but monitor briefly shows "entering power save mode" and goes blank.
The "entering power save mode" message occurs when the monitor does not detect an incoming signal. We would then assume that the laptop is not transmitting a signal to external monitor port. It's possible that the port and/or the motherboard are damaged.