I have a Latitude E5470 which is used with an E-Port II docking station.
Several times over the past few weeks the laptop has completely locked, dual monitors still displaying, mouse & keyboard not responding. If you remove the laptop from the docking station you get no display.They only thing that you can do is turn the laptop off by holding down the power button.
They system has the latest drivers/bios installed - all up to date in dell command update..
There is no pattern to the lock ups, happened at different times and whilst in different applications. Totally randomly.
Thank you for reaching out to Dell Community Forum.
Can you try with another docking station or another system on this docking station?
Please click my DELL-username and send me a Private Message with the Dell Service Tag number and your email address.
Note: please don't mention the service tag or email id on the public forum as it contains your personal information