Review on ViewSonic VP3268A 4K Ergonomic DisplayPort Professional Monitor, 3840X2160P Resolution, Cable Lock Slot, Anti-Glare, 3H Surface Hardness, On-Screen Display (OSD), ‎VP3268A-4K, HDMI, HD, 4K by Gene Ulrich

I was trying to build my own computer and bought this monitor to work with. I couldn't turn on the computer until I realized that the problem wasn't with the computer, it was that neither of the two DisplayPort connectors on the back of the monitor were working. I bought a replacement cable to see if there was a problem with the cable that came with the monitor, but the replacement cable didn't work either. I was able to connect to the HDMI port, but even with that port, the monitor turns off as soon as someone touches the cable that connects it to the computer. Having disassembled my computer for weeks to find the problem, I went through the returns window for this and can't even return the product. We strongly advise against buying this.