I got an AOC F22 Monitor and with a VGA to Display-port adapter. Always worked fine. Now that I removed the cable a couple of time to use a VR set, it doesn't work anymore. It will power on and give the blue light, say no signal and then swap to the orange light. I am using it as a second monitor next to my main monitor which is a Samsung on HDMI. My computer detects the monitor but it will just not turn on. I have tried everything. Please help.