SanDiegoXJ
1 Copper

RE: Latitude E7470 External Monitors with Dock Problems

That link is for the 7240/7440.  He has the 7470.

The 7470 may have the same hardware as the 7450, which has a diffent model of the Synaptics hub...but I haven't verified, and as of yet, I've been unable to find a fix for the 7470.

And the OS does not need to be reinstalled.  It's not a driver issue.  It's a Dell docking station/motherboard issue.

Browse the web a bit, and you'll see this problem is rampant.

Edit:  Just found new BIOS released on Dell website 3/18/16...might give that a shot.

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