02-28-2019 07:19 AM
We bought about 50 of these Pro Dock (40A7) units. Some of them will not drive a monitor, or the monitor video turns on and off. In these cases, after swapping parts, it seems to be the USB 3.0 cable. If I find a good USB 3.0 cable, I can take it to any non video working station and the monitor starts working.
Bill @ an Elementary School
03-12-2019 09:11 AM
03-27-2019 11:16 AM - edited 03-27-2019 11:22 AM
I'm on the 40AH dock and had these same problems: displays going black and white pixels flickering. I updated to the latest firmware (n20pf03w.exe), and that fixed it for a few days, but now both problems have come back, and worse than before.
What is wrong with these docks?
03-27-2019 11:40 AM - edited 03-27-2019 11:41 AM
I tried running the firmware update again, doing only Check FW. It said that I didn't need to update (which I expected). After doing this check, the white pixel flickering problem is gone (at least for the moment). The FW update utility does something to the dock even when you don't update the FW itself.
03-27-2019 12:01 PM
Since the last time I updated using the utility in this thread the flickering has come back but I have auto update enabled on my Lenovo Vantage. It has updated my BIOS once or twice now since I last posted. Farily disappointed
04-01-2019 09:01 PM
04-15-2019 12:47 PM
Installing the Intel management firmware update 11.8 fixed the issue on one of our malfunctioning docks, but not another (where the sparkles were really fierce).
Today I slowly replaced parts on that dock and lo-- it was the USB-C cable between dock and laptop that seemed the culprit, because as soon as I put in a "known good" cable, problem was solved.
I'm a little sad Lenovo would be shipping such cruddy components.
04-16-2019 12:56 PM - edited 04-17-2019 06:44 AM
I got a 40AJ dock a couple weeks ago so I could use three external displays. The new dock was fine until today when I started getting the white dots and the monitors cutting out.
So I ran the firmware update. The Check worked, but the Update failed because it timed out (don't know why). However, the white dots and black screen problems are gone for the time being.
Seems like just running the check in the firmware update fixes the issue at least temporarily.
Hope this helps someone -- just keep running the update