Ford Focus Dashboard Cluster Fault

Hi everyone,
thank you so much for putting all this information up. I have one BIG problem. I followed the steps to take off the PCB board and cleaned it with PCB cleaner, but now nothing works. The car will not start, the clocks dither rapidly and the warning lights show up randomly and then disappear. It's just not normal. Absolutely nothing works, not even the central locking. Is there anyone who has any ideas on where I went wrong or can advise me out of this black tunnel I find myself in?

I would be ever so grateful for any suggestions.

Thank you in advance.