I have what I think is an LCD monitor (probably 4-5 years old), and it flickers as if there is an electrical current passing nearby. I've moved all the wires away from it but it continues to flicker. It is especially noticeable on darker surfaces such as grey or carbon fibre-type textures, but it's visible all the time. I've tried changing the refresh rate. Is there anything else I can do? Other threads say 'buy a new one'. I don't really want to, but if I have to...