Hi @antonybord ,
You probably have a loose tab connection on the LCD panel itself.
Here’s a [https://www.youtube.com/watch?v=98a8iMokMcY|video] that shows what I mean. I realize it is not your model but the principle is the same.
You will have to dis-assemble the screen to get access to the tabs. You could try gently pushing the tab back to see if it makes contact and holds otherwise it will mean a new panel.