I've had this for the past two years but it's still not working I tought maybe time would tell but no signs of anything the menu doesn't open and no display except static grey.
Did not work ;(CHOOSE HDMI input while monitor is turned on WITH BLACK SCREEN.
Basically monitor software still works, You can go inside input menu by
make sure monitor is on (no blue light)
press menu button
left and click
now you are in input selection, you can try to go all up and click,
if it doesn't work then repeat but with all up and -1 and then all up-2.