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HP ZBook Fury 16 G9 Mobile Workstation PC (609M3AV)

Hello, we are using 3 sets of HP Zbook Fury 16 G9  + HP Thunderbolt Dock 280W G4 + two AOC U27P2. On each of them, external monitors are going off and on randomly when connected via a docking station. OS, graphics card, docking station, bios drivers and firmware are up to date. External monitors are still visible when connected remotely, but physically going black for like 3-4 seconds. 

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