As homework solution and will to drive 4x 19″ iiyama ProLite B1906S monitor i bought a CSV-6400, but i cannot get them or even one monitor to work properly.
The behaviour im seeing w is that the screen is showing 640×480 resolution (in windows, but also during bios POST) monitor’s native resolution is 1280×1024 it displays like this, with a pink column left of it: 
also it alternates by showing this screen for 2 seconds, then 2 seconds black screen.
i tried unhooking everything and then just add a single monitor, behaviour remains the same
I’m using a standard DVI cable with a HP P/N-481409-001 Bizlink0952 DP->dvi adapter. (even tried 2 other p/n but still HP bizlink adapters) Im unaware my this adapter is active or passive, it does not have its own power-supply.
Got the CSV-6400’s power supplie from an old 1A HTC phone-charger and its uplink DP to my sapphire amd radeon 290 (non x). Running windows 10, installed laters radeon drivers
I’m hoping someone can pinpoint the problem at the adapter (or perhaps my monitors), since monitors and adapters are free leftovers from work. i’m reluctant to just buy 4 new adapters and/or cable’s (also with corona crisis delivery times and/or prices are crazy) with the chance there funtionally the same as the adapter’s im using now
