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E7440 Integrated display and usb adapters turn off when docked
We have multiple E7440 laptops for our environment.
One of them however seems to have a docking issue. Laptop works great, but when you dock it, the display goes blank, and nothing shows on external displays connected to the dock.
I have updated to the newest display driver, and flashed the bios (A10), I have also set trackpad/mouse to ps2 only in the BIOS. I have even done a full OS reinstall and tried fresh.
If I plug in USB graphics adapters into the laptop, the display properly replicates/extends to the other monitors. If I dock the laptop, the integrated and usb adapter monitors go black.
If I plug the USB graphics adapters into the dock, no change.
I have tried VGA, DisplayPort, and DVI cables on the dock, different monitors, and different cables.
I have tried docking the laptop into multiple docks with no change.
Is it a problem with the docking port on the underside of the laptop?
DELL-Shawn B
3 Apprentice
3 Apprentice
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October 15th, 2014 10:00
Hi Andrew.oldridge,
Thanks for the post and giving us a rundown of what troubleshooting you’ve already been through. From what you’re describing I would certainly suspect the systems docking port to be the issue here. As you have multiple systems though, I would suggest you try swapping hard drives with a known good unit, so software/ OS can be ruled out.
If with a known good drive installed the system continues to have issues on dock I would recommend contacting Dell support in your area to request service, please feel free to DM me your details as well i and will do all i can to help.
Thanks,