IPS234 monitor blinks
I received this monitor from a friend yesterday and connected it to my laptop with an HDMI cable. At that time everything was fine.
This morning, after turning the laptop on, the monitor will not sustain an image. The power indicator blinks on and off. The laptop is in duplicate mode. When it blinks on the laptop screen image flashes momentarily, then the monitor goes dark. This keeps repeating.
My laptop is an HP with Win10 Pro. I've tried installing the LG driver, setting the power to never sleep and making sure the resolution is recommended for the monitor. Nothing has fixed the problem. I can't access the monitor's menus unless I disconnect the laptop. But don't know if there is a setting there that is needed. I connected the laptop to another monitor using the same cable and it worked fine.
From what I can tell the monitor is in sleep mode. At least that is what the manual says is the reason the power indicator is blinking. If that is true, how do I get it out of sleep mode?
Can anyone help? Thank you.