Connected screen and ethernet dropping out / blinking Dell M3800

[Digger]

Dell M3800, Quadro 1100 and intel 4600 graphics etc etc.

OK, I have now tried every combination of drivers known to man. Some good some bad. I have put the machine to the latest Dell approved driver versions (quite old on some fronts)

The screen plugged into the display link keeps dropping out (going black) along with the Ethernet connection dropping out.

Some times it won't happen for hours and at others it's every 20 seconds which makes it pretty much unusable.

I have run the "Tool" and attached the zip.

Please help before I bin it.