It has been connected and working for quite a while a little over two years. I have it connected to a docking station for my laptop which is a thinkpad. Just suddenly it stopped working at all only flashes my extended screen then goes dark. I have powered it off for an extended amount of time to see if that resets it. I have attached other monitors to my laptop to make sure it is not the laptop. The power source is good. My last test would be the cable I have ordered an HDMI cable to connect that is HDMI on both ends... Not sure what else to do and not sure how to completely reset it as the menu will not even come up.
Well I dis test with an alternate cable and that did not resolve. It was a USB to pin cable. I have been given another monitor to us I am a developer and I needed it badly as working off of laptop screen does not work well as any developer would know. I purchased it at Costco and not sure what type of coverage there is for this but it is barely maybe 2 years old.