P2419H, power light on, black screen

Hi community,

I have owned the monitor since 2020, no issues. always worked. Whilst working on the screen today, it suddenly faded away to the left middle of screen and went black. Power light still on but black. Tried everything to reset; power cables out, hdmi cables out, 8 second power button reset etc. Still showing black screen. When I disconnect hdmi from laptop and reconnect, can hear the handshake "ping" that its connected but still black screen. When I look at display settings, shows 2nd display next to my laptop (1) but when I click on "detect" it says "didnt detect another display". Even if I disconnect the cable and leave the power on the monitor, I dont see the "screen saver" showing the connect logo or anything. I'd appreciate any help on this, unless its far gone and needs replacement :-(