LED screen repair

[berkin]

Any idea what could be causing this and if/how I'd go about repairing it? sometimes it'd flicker those lines for just a frame or so, but it suddenly got like this earlier today. It's just the monitor itself, as it happens even with no signal, just the power connected.
The device is a 32UD59-B, a discontinued LG monitor.

 

[Martaine2005]

That looks very much like a bad/loose connection.
I would first open it and re-seat all connectors/ribbon cables.
Then secondly, check for dry/cracked solder joints.

Martin