MacBook Pro 2019 16 inch screen faults when opened fully

Hi,

Yesterday while working, my screen suddenly showed vertical coloured lines and flickered. After some investigation, I realised that it only happened when the lid was fully open. If only opened a small angle, the screen is fine.

The device has had no bangs or drops - indeed this just happened out of the blue whilst using the MacBook normally. I have attached an image.

Some sources appear to say I need.a while new display unit!!! Some maybe just a display cable. Are these right?

Many many thanks in advance if your help