What's my next step to fix poorly QL

[Citizenfish]

I have two QLs, one boots and display's perfectly on this screen (UHF) the other is giving me this display with no response after pressing F2.

I'm new to QL hackery so can anyone help me here. I am pretty sure it is not the display.

Thanks
Dave

[Citizenfish]

You star! I now have 2 working QLs

Sadly the keyboard ribbon was in a terrible state and had to be trimmed. That will need replacing long term