Linux/Ubuntu- new user looking for repair near Croydon/Surrey/S.London

I am a relatively new linux/ Ubuntu user (6 months) and am having start up problems. The friend who installed the system is out of the country for the next few months. I have had no joy getting it repaired at a standard PC Repair shop ( they tried but failed) and am looking for someone near my area Croydon (happy to travel a bit within London or Surrey). I would welcome any recommendations.

Maybe someone here can help walk you through the problem and a fix ?

Can you define what you mean by “startup problems” ?

Oh, and welcome to the forum :slight_smile: