External monitors often going off and on

[KDSmithAggie]

I have an HP Zbook and two HP Thunderbolt docks.  One dock is used at home and one at the office.  This black display problem persists on BOTH docks.  And, if I disconnect from the dock, the problem goes away.  I did not suspect the dock until I read this thread, so thanks to HP community for helping me troubleshoot this thing.  I went against the tide of Dell in our office with this Zbook and for this dock problem and other reasons, my next will be Dell. 

[RobertYuile]

The easiest way to reset the screens is to press the top of the Thunderbolt. All screens go off and ALL come back on again.

It's a terrible solution for a problem that HP are taking ZERO responsibility for and leaving their customers to figure out workarounds for themselves.

I fully agree with KDSmithAggie - I'm switching to Dell when this setup is due for replacement and I won't be coming back to HP again. Brand loyalty is a two-way street and I've reached the end of this road.