5 Posts
0
9681
External monitor disconnects partway through Windows 10 boot
I have a Dell Precision M4700 with NVIDIA Quadro K2000M graphics. I use it in two locations, each with a different 24" Dell monitor, in one case via VGA and the other via DisplayPort. This is important, because it shows it has nothing to do with the monitor or the particular way the laptop is connected up. Each has been working just fine for a couple of years at least. I power on and immediately close the lid; the BIOS displays come up on the external monitor, followed by the Windows stuff and finally the login screen. Suddenly a few days ago it started failing, about 75% of the time. It gets as far as the first part of the Windows boot, then displays "entering power save" and that's that. I have to open the laptop lid and use the laptop screen to go through the shut down sequence. I try again and again and finally I get through the Windows boot and all is well. I have just installed the latest NVIDIA driver without the fault going away. It may be relevant that during the driver installation the external monitor went blank, displayed the "entering power save" message, and never came back to life. I had to open the laptop lid and use that screen to recover. What has changed, and how can I fix the problem?
PTWallace
5 Posts
1
April 12th, 2019 01:00
No, and something seems to have changed in the NVIDIA Control Panel so that I see only the external display. Another curiosity is that the Intel display adaptor has disappeared from Device Manager.
Serendipitously, I have overcome the problem by going to Power Options and toggling Fast Startup, whereupon the original booting behavior returned and all is well. It seems clear to me that the Windows Update left the Fast Startup context out of step with the OS, and that I have now managed to repair things.
PTWallace
5 Posts
0
April 8th, 2019 03:00
Correction: the monitor I said was connected via VGA is in fact DVI-D. But I don't think this is relevant because the problem happens with both setups.
Note: I see I had a Windows update three days ago, which was precisely when the problem started.
sfortin
199 Posts
0
April 8th, 2019 15:00
Did you try right-clicking on the desktop and going into Display Settings and setting up the display on external monitor? I think you'd have to do this twice, once for both displays.