With my PC (Dell Optiplex 7050 with Intel HD 530 GPU) plugged into my receiver (Yamaha RX-V6A), the display flashes black for two seconds every five seconds! If I unplug receiver power and restart, it's fixed for a while, but comes back every few days. Any ideas?
I'm using this with an HDMI output. Same thing happens whether I set the PC display output to 4k or 1080p. It happens even on the computer's boot screen and BIOS menu.
Note that I see a few flashes when I plug this PC into my Viewsonic 4k monitor, but nothing persistent like this.
I've tried scratch installing Windows 10 and updating the GPU driver.
Any ideas how to diagnose this or what might be causing it?
