Electricity is dangerous so your main focus when tracing a fault should be safety.
I've solved problems that were as simple as an erratic short circuit in a toaster or as difficult to find as a worn or broken part of a ring main circuit.
Please let me know what the symptoms are, a bulb that fails repeatedly or a fuse that blows / RCD circuit that trips
I have the equipment to rapidly trace problems and advise on how they can be most cost effectivly corrected.
Call me for advice on 07871 926 721